Find the Best Suspension Kits for your vehicle — top-rated and reliable options.
This article is part of our Suspension Kits Guide.
A suspension kit can be a smart way to refresh worn parts all at once, whether you are fixing clunks, improving ride quality, or replacing aging components before they fail. But not every kit includes the same pieces, and even a high-quality kit should be checked carefully before anything goes on the car.
Knowing what is typically included helps you compare kits and avoid surprise trips to the parts store. Just as important, inspecting each component before installation can save you from installing the wrong part, fighting bad hardware, or damaging new parts because something was overlooked.
Below is a practical breakdown of the most common suspension kit components, what each one does, and what you should inspect before starting the job.
What a Suspension Kit Usually Includes
The term suspension kit can mean very different things depending on the vehicle and the seller. Some kits are basic front-end refresh packages. Others are complete overhaul kits with shocks, springs, control arms, links, bushings, and hardware. Always read the exact parts list instead of relying on the product photo.
Most kits are built around one of three goals: replacing worn steering and suspension parts, restoring ride quality, or changing ride height and handling. A stock-replacement kit and a lift or lowering kit may share some parts, but they are not the same type of package.
- Basic kits may include only shocks or struts plus installation hardware.
- Mid-level kits often add sway bar links, ball joints, tie rods, or control arms.
- Complete kits may include springs, mounts, bushings, bearings, and alignment-related hardware.
- Lift and leveling kits may include spacers, brackets, extended shocks, and correction parts for geometry.
Common Parts You May Find in a Suspension Kit
Shocks and Struts
Shocks and struts control spring movement and help the tires stay planted on the road. Struts are structural on many vehicles and may also serve as the mounting point for the spring and steering knuckle. If your kit includes quick-struts, they may already come assembled with a spring, mount, and bearing plate.
Coil Springs or Leaf Spring Components
Springs support vehicle weight and determine ride height. Some kits include coil springs, leaf spring packs, helper springs, or rear blocks and spacers. Reusing weak or sagging springs with new dampers can limit the benefit of the repair.
Control Arms
Control arms connect the wheel assembly to the chassis and allow controlled up-and-down movement. Many replacement control arms come preloaded with bushings and ball joints, which can save time and reduce press work.
Ball Joints
Ball joints act as pivot points between the control arm and steering knuckle. They are wear items and can cause popping, uneven tire wear, vague steering, and alignment trouble when loose.
Tie Rod Ends
Inner and outer tie rod ends connect the steering rack to the wheels. Suspension and steering kits often bundle them together because worn tie rods commonly show up at the same time as other front-end wear.
Sway Bar Links and Sway Bar Bushings
These parts help control body roll in corners. Bad links and bushings are a common source of knocking noises over bumps, and they are inexpensive enough that many kits include them.
Bushings, Mounts, and Bearings
Depending on the vehicle, a kit may include control arm bushings, trailing arm bushings, strut mounts, upper mounts, insulators, or strut bearings. These smaller pieces matter because old rubber and worn bearings can create noise and play even when the larger parts are new.
Spacers, Brackets, and Ride-height Hardware
Lift, leveling, and lowering kits may include coil spacers, torsion keys, drop brackets, extended bump stops, relocation brackets, or cam bolts. These parts change suspension geometry and may require extra attention to alignment, brake hose routing, and driveline angles.
Installation Hardware
Some kits include new nuts, bolts, washers, lock nuts, sleeves, cotter pins, and grease fittings. Do not assume hardware is included. Many suspension jobs stall because a one-time-use fastener or specialty nut was not in the box.
What May Not Be Included Even when You Expect It
A common mistake is assuming a kit is complete when it is really only partial. Product names like front suspension kit or complete strut assembly kit do not always mean every wear item is covered.
- Strut mounts and bearings may be sold separately unless the kit uses quick-struts.
- Bump stops and dust boots are sometimes omitted.
- Alignment cam bolts are often not included.
- New control arm bolts may not come with the arms.
- Grease, anti-seize, and thread locker are usually not included.
- Lift kits may not include everything needed to correct alignment or driveline angles.
- Spring compressors or specialty tools are never part of the kit.
Before ordering, compare the parts list against what your specific repair actually needs. If you are already taking things apart, it may make sense to replace mounts, links, or bushings at the same time.
Inspect the Kit Before You Start the Job
Open every box before the vehicle is disabled on jack stands. Lay the parts out, compare left and right sides, and match them to the order sheet. Catching a wrong part after disassembly can turn a one-day repair into a weeklong wait.
Check Part Numbers and Application
Verify the parts match your exact year, make, model, trim, drivetrain, engine, and suspension package. Small differences matter. Front-wheel-drive and all-wheel-drive versions, sport suspensions, tow packages, and lifted trims may use different springs, mounts, or geometry parts.
Compare Old and New Parts Side by Side
Before installing anything, compare mounting points, overall length, stud orientation, bushing width, taper size, brake line bracket locations, and ABS wire tab placement. Even a part that looks close can be wrong enough to create serious fitment issues.
Look for Shipping Damage
Inspect for dented shock bodies, torn boots, bent studs, damaged threads, cracked powder coating, missing grease fittings, and broken plastic retainers. Shipping damage is more common than many DIYers expect, especially with heavy kits.
Check Bushings, Boots, and Seals
Rubber should be cleanly molded and seated correctly. Ball joint and tie rod boots should not be twisted, torn, or leaking grease. If a pre-greased joint looks dry or the boot is already compromised, do not install it.
Inspect Threaded Areas and Hardware Quality
Make sure studs and bolts thread smoothly by hand where appropriate. Confirm you have the right nuts, washers, sleeves, and cotter pins. Poorly cut threads, damaged lock nuts, or incomplete hardware packs can stop the job midway.
Specific Things to Inspect by Component Type
For Shocks and Struts
- Correct compressed and extended length for the application
- Proper upper and lower mounting style
- No oil leakage, dents, or bent shafts
- Spring seat and bracket positions match the original
- Dust boots and bump stops are present if supposed to be included
For Quick-strut Assemblies
- Left and right units are not swapped
- Top mount studs match the body pattern
- Spring orientation is correct in the lower seat
- Bearing plate rotates smoothly where applicable
- Brake hose and ABS wire brackets are in the right location
For Control Arms
- Bushing sleeves match the factory bolt diameter
- Ball joint stud taper and thread size match the knuckle
- Arm shape clears surrounding components
- Grease fittings are accessible after installation
- No cracked welds or shipping bends
For Tie Rods and Ball Joints
- Castle nuts and cotter pins are included where needed
- Boots are seated and not pinched
- Stud length and taper match the mating part
- Threads are clean and jam nuts fit correctly
- Greaseable parts include the proper fittings
For Springs, Spacers, and Lift Parts
- Ride-height parts are the correct thickness or rate
- Spacer holes align with factory studs or bolts
- Coating is intact with no deep chips or cracks
- Leaf spring center pins and clamps are secure
- Instructions cover torque specs and any trimming or relocation steps
Inspect the Vehicle Before Installing New Suspension Parts
The new kit is only part of the equation. You also want to inspect the vehicle so you do not bolt fresh parts onto worn or damaged mounting points.
- Check subframes, control arm mounts, and spring perches for rust, cracks, or elongation.
- Inspect knuckles and steering arms for damaged tapers or stripped threads.
- Look at brake hoses and ABS wiring to make sure they will not be stretched at full droop.
- Check CV axles, wheel bearings, and hub play while the suspension is apart.
- Inspect sway bars for bent ends or worn frame bushings.
- Look for leaking power steering or rack issues if tie rods are being replaced.
- Measure current ride height if you want to compare results after the repair.
If the vehicle has severe corrosion, seized fasteners, or damaged mounting holes, deal with that first. A suspension refresh can uncover problems that must be repaired before the new parts go in safely.
Tools, Supplies, and Prep Work That Make the Install Easier
Many suspension jobs are straightforward in theory but become difficult because of rust, loaded springs, or tight access. Having the right tools ready can prevent unsafe shortcuts.
- Torque wrench
- Breaker bar and penetrating oil
- Ball joint separator or pickle fork if needed
- Tie rod tool or inner tie rod tool for steering work
- Spring compressor if you are not using quick-struts
- Pry bars, hammer, and dead-blow mallet
- Jack stands and a quality floor jack
- Wire brush for cleaning threads and mounting surfaces
- Replacement one-time-use hardware if the service manual calls for it
Check the service information for torque specs and tightening procedures before you start. Some bushing bolts must be torqued at normal ride height, not with the suspension hanging. Missing that detail can preload bushings and shorten their life.
Installation Mistakes to Avoid
A lot of suspension problems after a repair are caused by install errors, not bad parts. Taking a few extra minutes during assembly can save you from squeaks, uneven tire wear, and repeat labor.
- Do not tighten rubber-bushed pivot bolts at full droop unless the procedure specifically calls for it.
- Do not reuse visibly damaged or torque-to-yield hardware when replacement is recommended.
- Do not mix left and right quick-struts or control arms.
- Do not over-grease joints with sealed boots that can rupture under excess pressure.
- Do not let brake hoses or ABS wires twist or stretch during assembly.
- Do not skip marking tie rod length if you are replacing steering parts before alignment.
- Do not assume ride height changes will settle instantly; some kits need a short break-in period.
Plan for an Alignment After Suspension Work
If you replace struts, control arms, tie rods, ball joints, springs, or ride-height components, plan on getting a professional alignment. Even if the steering wheel looks straight after the install, the toe, camber, or caster may still be out of spec.
Driving too long without an alignment can chew up tires quickly and make the vehicle pull, wander, or feel unstable. On modified trucks and SUVs, you may also need extra correction parts to get alignment back into range.
When a Complete Suspension Kit Makes Sense
Buying a kit often makes sense when several parts are worn at once, the vehicle has high mileage, or you want to save labor by refreshing everything during one teardown. It can also help keep ride quality and handling balanced across both sides of the axle.
However, a kit is only a good value if the parts are correct for the vehicle and the quality is acceptable. Sometimes it is smarter to buy fewer parts from a better brand than to install a bargain kit that may not last.
Bottom Line
A suspension kit may include shocks or struts, springs, control arms, ball joints, tie rods, sway bar links, bushings, mounts, spacers, and hardware, but the exact mix varies widely. The safest approach is to verify every part, inspect it closely, and compare it to the vehicle before the first bolt comes out.
If you catch fitment issues, damaged components, missing hardware, or worn mounting points early, the installation will go faster and the finished repair will be quieter, safer, and more likely to last.
FAQ
Does Every Suspension Kit Come with Shocks or Struts?
No. Some kits focus on steering links or control arms only, while others are built around shocks, struts, or ride-height parts. Always read the itemized parts list.
Do I Need to Replace Springs when I Replace Struts?
Not always, but weak or sagging springs can hurt ride height and handling. If the vehicle sits low, has high mileage, or the springs are rusty or damaged, replacement is worth considering.
Should I Replace Suspension Parts in Pairs?
In most cases, yes. Replacing left and right side wear items together helps keep handling, ride height, and damping balanced, especially with shocks, struts, springs, sway bar links, and control arms.
Can I Install a Suspension Kit Without Getting an Alignment?
You should plan for an alignment after most suspension work, especially if you replace struts, tie rods, control arms, ball joints, springs, or lift components. Skipping alignment can cause tire wear and poor handling.
What Is the Biggest Thing to Check Before Installation?
Fitment. Verify part numbers and compare each new part to the original for length, bracket location, stud pattern, taper, and hardware. A small mismatch can make the part unusable or unsafe.
Are Quick-struts Easier to Install than Separate Struts and Springs?
Usually yes. Quick-struts come preassembled, so they save time and eliminate the need to compress the spring. They are often the safer and faster option for DIY owners.
Can I Reuse Old Suspension Hardware?
Sometimes, but not always. If hardware is corroded, stretched, damaged, or listed as one-time-use by the manufacturer, replace it. Reusing questionable fasteners can lead to noise or failure.
What if the New Suspension Kit Changes Ride Height?
Expect alignment changes, and possibly changes in CV axle angle, steering geometry, and brake hose routing. Make sure the kit includes or recommends any correction parts needed for your vehicle.
Want the full breakdown on Suspension Kits - from costs and replacement timing to DIY tips and how to choose the right option? Head over to the complete Suspension Kits guide.