Note: This article contains affiliate links. If you click on these links and make a purchase, I may earn a small commission at no extra cost to you. This helps support my research and content. Read my full affiliate disclaimer here.
If you drive a Buick LaCrosse, the intake manifold plays a big role in how smoothly your engine breathes and how reliably it runs. Choosing the right intake manifold affects throttle response, fuel distribution, and long-term sealing against vacuum and coolant passage issues. This guide highlights seven shortlisted intake manifolds that stood out for fitment, build quality, and sealing performance. We evaluated each option on material, compatibility with stock components, and expected durability to help you narrow the choices. Read on for the criteria we used and what to look for when selecting the best fit for your LaCrosse.
Looking for other parts? See all Buick LaCrosse parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | HiSport 12673300 Lower Intake Manifold Gasket Kit |  |
| Most Popular A crowd favorite that many people choose with confidence | BENERAY Intake Manifold Gasket Set for 3.8L V6 (3800) |  |
| Best Quality Built to a higher standard if you want something more solid | GBTAD Ignition Coil Pack and Spark Plug Kit with Gaskets for Buick LaCrosse |  |
| Best Budget The cheapest option that still gets the job done reliably | HiSport Intake Manifold Gasket Set for 3.6L GM V6 |  |
| Most Sold A high-volume bestseller chosen again and again | A-Premium Intake Manifold for 2.4L 4‑Cylinder Engines |  |
| Best Value for Money The sweet spot between price and what you get | Gledewen 3.8L Intake Manifold Gasket Set — Upper Gasket Kit |  |
| Best Overall The best all-around choice for most situations | Gledewen Complete Head Gasket Set with Intake and Exhaust Gaskets for 2.4L L4 |  |
1. HiSport 12673300 Lower Intake Manifold Gasket Kit
| Part number | 12673300 |
|---|---|
| Compatible engine | 3.6L V6 |
| Brand | HiSport |
This HiSport lower intake manifold gasket kit replaces factory-style gaskets on 3.6L V6 GM engines and is intended to restore an airtight seal between the intake manifold and cylinder head. It is typically used when diagnosing or repairing intake leaks, oil seepage around the manifold, or any performance issues related to vacuum loss. The listing notes multiple part-number cross-references for fitment, and customer feedback indicates straightforward fit and good sealing on compatible Buick models. In practical terms the kit helps stop oil and contaminant ingress to the valve train and supports stable idle and engine performance after installation. Expect a standard aftermarket fit that requires careful torque during installation to avoid over-compressing the seal. This is a focused replacement part rather than an upgraded performance component, so longevity depends on correct installation and engine condition.
Best for: Reliability-focused buyers who prioritize restoring factory sealing and preventing oil or vacuum leaks on a maintenance schedule rather than performance gains.
Less Ideal for: Drivers seeking performance upgrades, custom intake modifications, or parts for engines outside the specified 3.6L GM coverage should look elsewhere.
- Cross-references multiple GM part numbers for easier matching to factory parts
- Engineered to provide an airtight seal to prevent oil leaks and contamination
- Positive user reports of correct fit and straightforward installation on compatible vehicles
- Aftermarket fit may require careful torque and verification to ensure long-term sealing
- Not a performance upgrade—designed as a factory-style replacement only
Verdict A practical, factory-style lower intake manifold gasket kit for 3.6L GM engines aimed at buyers who want a dependable replacement to stop leaks.
2. BENERAY Intake Manifold Gasket Set for 3.8L V6 (3800)
| Material Type | Rubber |
|---|---|
| Fits Engine | 3.8L 3800 V6 |
| Interchange Part Number | MIS16203A |
This BENERAY intake manifold gasket set supplies the gaskets and seals needed when rebuilding or resealing the intake on the 3.8L 3800 V6. Typically used during intake plenum removal or when resolving vacuum leaks and coolant/oil seepage at the manifold, the kit includes molded rubber plenum gaskets and assorted seals intended to match factory mating surfaces. For a convenience-focused buyer the appeal is getting all necessary gaskets in one package so you can complete the repair in a single service visit. Practical benefits include materials engineered to meet factory-spec sealing and a full set of miscellaneous gaskets and O-rings that reduce trips for missing parts. Important limitations are that the kit is intended for installation by a professional or a mechanically skilled DIYer since no instructions are provided, and a few customers have reported occasional fitment mismatches on peripheral pieces, so double-check interchange numbers before installing.
Best for: Buyers who value convenience and want a single kit to complete an intake reseal on a 3.8L 3800 V6 without sourcing multiple parts separately.
Less Ideal for: If you prefer step-by-step installation guidance or need guaranteed perfect fit for every small gasket without verifying part numbers, consider purchasing factory-sourced parts or a kit with documented fitment.
- Complete kit includes intake plenum gasket plus miscellaneous seals and O-rings so multiple components are replaced at once
- Molded rubber plenum gasket designed to meet factory-spec sealing for the 3.8L 3800 V6
- Reduces the need for multiple orders by bundling all commonly replaced intake seals
- No installation instructions included, so professional installation or a service manual is recommended
- Some reviewers reported occasional incorrect-fit peripheral pieces such as throttle body gasket or O-rings
Verdict A convenient all-in-one gasket kit for repairing intake seals on 3.8L 3800 V6 engines, but verify fitment and plan for professional installation.
3. GBTAD Ignition Coil Pack and Spark Plug Kit with Gaskets for Buick LaCrosse
| Included Components | Engine Valve Cover Gasket x1, Ignition coil x6, Intake Manifold Gasket x1, Spark Plug x6 |
|---|---|
| Brand Name | GBTAD |
| Manufacturer Warranty Description | 1 Year |
This GBTAD kit provides a full ignition refresh for Buick LaCrosse V6 engines by supplying six ignition coils, six spark plugs, an intake manifold gasket and a valve cover gasket so you can replace all wear-prone ignition components in one service. It is typically used during scheduled tuneups or when diagnosing misfires, rough idle, poor fuel economy or check-engine codes tied to ignition faults. The listing highlights coils engineered for improved conductivity and epoxy encapsulation and pairs them with plugs and gaskets to simplify installation and reduce parts hunting. The practical benefit is convenience and a coordinated set of parts that can eliminate multiple failure sources at once, saving workshop time. Limitations are that some customers report intake gasket fitment differences between the 3.0L and 3.6L variations, so confirm engine version before installing, and the kit uses a third-party brand so buyers seeking an established OEM name may prefer an alternative.
Best for: Performance-oriented owners who prioritize restoring engine response and reducing misfires on a Buick LaCrosse V6 and who prefer a single bundled kit to update the entire ignition system quickly.
Less Ideal for: Buyers who require guaranteed factory-brand parts or those who are unwilling to verify exact engine displacement before ordering should consider alternatives.
- Complete kit includes six coils, six spark plugs, intake manifold gasket and valve cover gasket for a full ignition service
- Coils designed with high-density epoxy and conductive internals intended to improve spark delivery and durability
- Combines multiple parts to reduce diagnostic time and coordinate replacement intervals
- Includes spare gaskets and components that help avoid repeat disassembly during engine repair
- Intake gasket reported to fit some engine displacements differently, so fitment must be verified
- Third-party brand may not match perceived reliability of long-standing factory replacement brands
Verdict A convenient, performance-focused kit to refresh a Buick LaCrosse V6 ignition system, but confirm engine displacement for correct intake gasket fit.
4. HiSport Intake Manifold Gasket Set for 3.6L GM V6
| Compatible engines | 3.0L and 3.6L V6 (listed GM engine applications) |
|---|---|
| OE references | Includes multiple OE numbers such as 12673300, 12673301, 12646459 |
| Intended fitment | Buick LaCrosse and other GM models (see fitment range) |
This HiSport gasket set replaces the intake manifold sealing components used on many GM 3.0L and 3.6L V6 engines and is positioned as a budget-friendly aftermarket option. It is typically used when replacing a leaking intake manifold gasket or doing related upper-engine service; the set’s elastomer coating is intended to provide a more secure, oil- and air-tight seal than uncoated gaskets. In practice the coated surfaces should reduce vacuum leaks and oil seepage that cause rough idle or check-engine lights, and the set includes the common OE reference numbers to help confirm fit. Expect a no-frills aftermarket fit and finish that can save money compared with more expensive factory-quality parts, but buyers should verify exact engine VIN/engine designation before ordering to avoid fitment mismatches. Professional installation or careful torque sequencing is recommended since proper sealing depends on correct mating and bolt torque.
Best for: Practical, budget-conscious buyers who prioritize low repair cost and need a functional intake manifold gasket for routine engine repairs on Buick LaCrosse models.
Less Ideal for: Owners seeking a certified factory-quality or long-term performance upgrade should consider OEM or premium-brand gaskets instead.
- Elastomer-coated gasket surfaces for improved sealing against oil and intake leaks
- Covers common GM OE reference numbers for easier fitment cross-checking
- Budget-friendly option that reduces repair cost compared with higher-end replacements
- Aftermarket fit may require careful verification of engine designation to ensure correct compatibility
- Not marketed as factory-quality replacement, so long-term durability may vary
Verdict A cost-effective, elastomer-coated intake manifold gasket set that can solve common LaCrosse intake leaks if you confirm the exact engine fitment before installation.
5. A-Premium Intake Manifold for 2.4L 4‑Cylinder Engines
| Vehicle fitment | Buick LaCrosse L4 2.4L (covered model years) |
|---|---|
| Includes | Sensor, seal and nuts |
| Reference numbers | 12637620, 12651992, 12637193 |
This A-Premium intake manifold is a direct replacement intended for GM 2.4L four-cylinder engines, including fitment for the Buick LaCrosse model years covered by the 2.4L lineup. It supplies the engine with the air path previously handled by the factory manifold and includes the sensor, seal and mounting nuts needed for installation. The interior surfaces are smoothed to promote steadier airflow and reduce turbulence, which can improve throttle response compared with a rough cast replacement. Buyers report it matches factory fit and can be used during routine repairs or when the original manifold has carbon buildup or PCV-related clogging. There are mixed quality reports: many users find it performs well out of the box, but some have experienced sealing issues or fragile purge ports that required repair. Installation on a LaCrosse is a moderate job that can involve removing the fuel rail and related components, so plan for time and care. For owners seeking a lower-cost replacement that aims for factory-style performance, this part is a practical option if inspected carefully before final installation.
Best for: Risk-averse mainstream buyers who prioritize restoring factory behavior at a lower cost than dealer parts and prefer a straightforward replacement for routine repairs on a Buick LaCrosse.
Less Ideal for: Owners seeking a premium performance upgrade or guaranteed long-term durability without inspection should consider OEM or higher-end aftermarket options instead.
- Designed to fit GM 2.4L 4-cylinder applications including Buick LaCrosse for direct replacement fitment
- Ships with sensor, seal and mounting nuts to simplify installation
- Smoother inner runner surfaces intended to improve airflow and reduce intake turbulence
- Multiple user reports of good fit and function comparable to factory-quality replacements
- Some units have reported sealing problems around central bolt area leading to vacuum or oil leaks
- Plastic purge/connector ports have been reported to break on handling by several buyers
- A few users noted manufacturing defects requiring minor modification before use
Verdict A cost-conscious, factory-style replacement for the LaCrosse 2.4L that can restore airflow and function if inspected for seal and purge-port quality before final installation.
6. Gledewen 3.8L Intake Manifold Gasket Set — Upper Gasket Kit
| Brand Name | Gledewen |
|---|---|
| Fitment Engine | 3.8L Buick engines |
| Package contents | Graphite head gasket, MLS head gasket, upper gasket set, camshaft seals, O-rings, small gaskets |
| Warranty | 24-Month Warranty |
This Gledewen 3.8L intake manifold gasket set supplies the seals and small gaskets needed when servicing the intake on Buick 3.8L engines. Intended as an upper gasket/ intake kit, it includes the manifold gasket along with camshaft seals, O-rings, and multiple small gaskets so you can replace the common sealing points in one job. The listing emphasizes improved material flexibility, multi-layer construction, and resistance to high-temperature and corrosive conditions, which helps reduce the risk of coolant or vacuum leaks when installed correctly. For DIYers and independent shops the kit simplifies a multi-piece replacement and eliminates sourcing individual parts. Limitations are typical of aftermarket gasket sets: fit and finish can vary between production runs and careful surface prep and torque sequence are still required to prevent leaks. Also this kit targets the 3.8L Buick engine family only, so confirm engine part numbers before ordering.
Best for: A practical optimizer who wants a single, value-focused gasket kit to complete a 3.8L intake service on a Buick with minimal parts sourcing and predictable repair time.
Less Ideal for: Buyers seeking dealership-level factory parts history or guaranteed OEM interchangeability should consider sourcing manufacturer-branded gaskets or consulting a dealer parts department.
- Comprehensive kit contains intake gasket plus camshaft seals, O-rings and other small gaskets for a single repair session.
- Described multi-layer and corrosion-resistant construction intended to withstand high-temperature engine environments.
- Manufacture claims improved material flexibility and elasticity to help maintain sealing under thermal cycling.
- Fits Buick 3.8L engine applications listed for a direct replacement when part numbers match.
- Fitment is engine-specific so incorrect part-number confirmation can lead to returns or rework.
- As an aftermarket kit, component tolerances and longevity may vary compared with factory parts.
- Requires correct surface preparation and proper torque sequence; the kit does not eliminate installation care to prevent leaks.
Verdict A budget-minded, all-in-one 3.8L intake gasket kit that makes a full Buick intake reseal convenient, provided you verify the engine part number and follow proper installation steps.
7. Gledewen Complete Head Gasket Set with Intake and Exhaust Gaskets for 2.4L L4
| Compatible Engines | 2.4L L4 |
|---|---|
| Included Items | MLS head gasket, valve cover gasket, valve stem seals, intake & exhaust gaskets, front camshaft seal, O-rings, small gaskets |
| Manufacturer | Gledewen |
This Gledewen kit supplies a complete set of gaskets and seals needed when servicing the cylinder head on 2.4L L4 engines. It includes a multi-layer steel (MLS) head gasket plus valve cover gasket, valve stem seals, intake and exhaust manifold gaskets, front camshaft seal, O-rings and other small gaskets so you get the parts normally changed during a head job. The MLS head gasket and upgraded valve stem seals are intended to provide durable sealing across a range of temperatures, and the kit is presented as a factory-fit replacement so components should align with factory mounting points. For a DIYer or independent shop tackling a head gasket replacement the kit reduces parts hunting and can cut cost versus buying single items. Limitations: the set does not include cylinder head bolts and proper installation still requires inspection and resurfacing of mating surfaces to factory specifications; one report noted fitment issues with guide alignment on some units. Follow proper engine prep and torque procedures for reliable results.
Best for: Balanced all-round owners who want a single, economy-minded source for all gaskets and seals when doing a head service on a 2.4L engine and prefer the convenience of a complete kit over sourcing parts individually.
Less Ideal for: Owners who expect a guaranteed drop-in solution without checking or resurfacing mating surfaces, or shops that require OEM-branded parts and every factory fastener included.
- Complete kit includes MLS head gasket plus intake and exhaust manifold gaskets and common seals so you have the parts typically changed during a head service.
- MLS head gasket and upgraded valve stem seals aim to improve sealing durability across temperature variations.
- Market fitment covers GM 2.4L L4 applications, reducing the need to cross-reference multiple part numbers.
- Supplies small gaskets and O-rings often missing from basic kits, simplifying reassembly.
- Does not include cylinder head bolts or fasteners required for some rebuilds.
- Requires proper surface inspection and possible machining of head/block before installation for a reliable seal.
- A minority of users reported guide alignment or fitment mismatch on some engines.
Verdict A cost-effective, all-in-one gasket kit for 2.4L GM engines that streamlines a head service but still requires proper engine surface preparation and torque hardware sourced separately.
Choosing the Right Buick LaCrosse Intake Manifold: Key Factors to Consider
Vehicle-Specific Fitment
A correct fit ensures the manifold aligns with intake ports, mounting studs, and sensor locations. For the Buick LaCrosse, matching the manifold to the engine variant and production year avoids gaps that cause vacuum leaks and poor sealing.
Poor fitment often results in leakage at critical interfaces and can complicate sensor connections. Verify bolt pattern, throttle-body flange type, and spacing for vacuum lines before choosing a manifold to reduce installation time and rework.
Material And Manufacturing Quality
Materials like high-grade aluminum or reinforced composites resist warping and corrosion under thermal cycles. A consistently machined intake flange and well-formed runner walls support smooth airflow and help maintain an even seal with the head.
Manufacturing tolerances affect port alignment and surface flatness. Look for manifolds with documented machining processes or quality control notes, since better fabrication reduces the risk of leaks and premature failure.
Gasket Interface And Sealing Design
The mating surface design and the type of gasket provided determine long-term sealing reliability. A robust gasket interface accommodates minor surface imperfections and maintains a seal under changing temperatures and vibration.
Consider whether the manifold uses integrated sealing beads, dedicated gasket channels, or requires aftermarket gaskets. Proper sealing design also reduces the chance of coolant or vacuum cross-contamination and simplifies future replacement.
Compatibility With Sensors And Vacuum Lines
Intake manifolds must accommodate mass airflow, MAP, EGR, and other sensor ports, along with vacuum fittings. Manifolds that keep factory sensor locations and vacuum routing intact reduce the need for splicing or adapters.
Ensure all necessary ports are present and accessible for routine diagnostics. Retaining original vacuum pathways helps prevent drivability issues related to incorrect manifold pressure readings.
Ease Of Installation And Maintenance
Features such as clearly marked bolt locations, accessible mounting hardware, and well-documented torque guidance make installation smoother. Manifolds that allow straightforward access for gasket replacement or cleaning save time during routine service.
Consider how the manifold interfaces with surrounding components, whether special tools are required, and whether the design allows for safe cleaning of carbon buildup without full removal when applicable.
Thermal And Flow Characteristics
Runner shape, plenum volume, and surface finish influence airflow distribution and how the engine responds across the rev range. Materials and design that manage heat transfer help avoid hotspots and reduce the risk of warping.
Think about whether you prioritize steady low-end torque, high-rpm power, or a balanced response. The manifold should support the engine's intended operating characteristics while maintaining stable temperatures and consistent flow to all cylinders.
FAQ
How do I tell if my Buick LaCrosse intake manifold is failing?
Common signs include rough idle, poor acceleration, or unexplained vacuum-related codes. You may also notice coolant contamination in the intake or repeated coolant loss without an obvious external leak. These symptoms often warrant a focused inspection of the manifold and its gasket surfaces.
Can I clean an intake manifold instead of replacing it?
Cleaning can help if the issue is carbon buildup or minor deposits on the runners and plenum. However, cleaning will not fix warped flanges, cracked passages, or compromised gasket surfaces. Inspect sealing faces and internal passages to determine whether cleaning or replacement is the appropriate solution.
What role do torque specs play when installing an intake manifold?
Correct torque on mounting bolts ensures even clamping of the gasket and prevents warping of the manifold flange. Following the proper torque sequence and values reduces the chance of vacuum leaks and uneven sealing. If torque specs are not provided, consult vehicle-specific documentation to avoid over- or under-tightening.
How can I diagnose an intake manifold vacuum leak?
Start with a visual inspection for cracked hoses, loose fittings, or damaged gasket surfaces. A smoke test or using a handheld vacuum gauge can help locate leaks in hard-to-see areas. Listening for hissing noises under operating conditions and checking for inconsistent idle or fuel trims can also point to a vacuum leak.
Are performance-focused intake manifolds worth considering?
Performance manifolds can alter airflow characteristics to favor higher rpm power or improved throttle response, but they may change low-end drivability and require supporting modifications. Consider your driving goals and whether the manifold preserves necessary sensor and vacuum connections before choosing an upgraded design.
How We Chose the Best Buick LaCrosse Intake Manifold
We focused on attributes that most directly affect installation success and in-service reliability for Buick LaCrosse intake manifolds. Key criteria included precise vehicle fitment and bolt pattern alignment, material and manufacturing quality to resist warping and corrosion, gasket interface design and sealing surface finish, and compatibility with factory sensors and vacuum lines. We also weighed ease of installation, documented torque specifications or guidance, and the availability of clear mounting and vacuum port layouts. Products were excluded if they lacked clear fitment information for the Buick LaCrosse, did not provide adequate sealing detail for coolant or vacuum passages, or required extensive modification to mating components. We prioritized manifolds that minimize the need for additional adapters and that support routine maintenance such as cleaning and gasket replacement. The final list reflects items that balance reliable sealing, durable construction, and straightforward fitment for typical LaCrosse installations.
Our full evaluation process is outlined in our review methodology.
Conclusion
When selecting a Buick LaCrosse intake manifold, prioritize accurate fitment, robust sealing at the gasket interface, and material quality that resists heat and distortion. Balance airflow characteristics with the engine's intended use and make sure the manifold maintains factory sensor and vacuum connections. Accept that tradeoffs exist between ease of installation, long-term durability, and any performance-oriented shaping of the runners. Use the factors outlined here to weigh those tradeoffs and choose the option that best matches your installation preferences and driving goals.
Explore More:
- Check out all Buick LaCrosse parts & accessories
- Explore Engine
- Browse all Auto Parts
