Do You Need Shocks With Coilovers: The Facts

Do You Need Shocks With Coilovers?

In most cases, you do not need separate shocks with a complete coilover kit because the shock absorber is already built into each coilover assembly. The spring supports the vehicle’s weight, while the shock controls how quickly the spring moves after a bump. These parts work together to keep the tires in contact with the road.

A complete coilover replaces the factory spring and damper arrangement where the kit is designed to do so. The assembly may also include a threaded body, adjustable spring seat, and mounting hardware. Depending on the design, you may reuse some factory parts, such as top mounts or rubber isolators.

There are exceptions. Some products called coilover kits are conversion systems or spring kits rather than complete assemblies. Such products may require a specified shock absorber or other compatible parts. The product name alone does not prove that every component is included.

• Complete coilover kit

  The spring and damper are supplied as a matched assembly. Separate replacement shocks are usually not needed.

• Coilover conversion kit

  The kit may reuse selected factory components or require additional parts listed by the manufacturer.

• Coil springs sold separately

  A spring-only kit may require compatible shocks or struts. It should not be treated as a complete coilover system.

How Coilovers Differ From Shocks and Struts

A shock absorber is mainly a damper. It controls suspension movement but does not usually support the vehicle in the same way a coil spring does. A coilover combines a spring and damper into one assembly, while a strut is a structural suspension component that also helps locate the wheel.

The terms can overlap in product names. A coilover may contain a shock-type damper or a strut-style damper, depending on the vehicle. This is why it is more useful to check the suspension design than to rely on a label alone.

On many cars, the front suspension uses struts while the rear uses separate springs and shocks. Other vehicles use coilover-style units at both ends. A coilover kit may replace the factory strut assembly at the front and replace the rear spring and shock arrangement with a different design, if engineered for that vehicle.

• Shock absorber

  Controls suspension motion. It may be mounted separately from the spring.

• Strut

  Acts as a damper and a structural part of the suspension, often supporting steering and wheel-location functions.

• Coilover

  Combines a coil spring and damper in one assembly, often with adjustable ride height.

When Might You Need Separate Shocks With Coilovers?

You may need a separate shock absorber when the product you purchased is not a complete coilover assembly. For example, a lowering spring kit may use the factory shock if it remains compatible, or it may call for a shorter or otherwise suitable replacement damper. This is different from buying a complete coilover kit.

A vehicle may also use separate rear springs and dampers even when the front suspension has coilovers. In that case, the rear shocks may remain in use unless the chosen rear kit replaces them. Do not assume a front coilover package automatically includes every rear suspension part.

A damaged, worn, or leaking shock may also need replacement if the suspension design still uses that shock. However, adding an extra shock to a complete coilover assembly is not a normal repair. The correct response is to identify the faulty part and follow the kit maker’s repair or replacement guidance.

• Spring-only upgrade

  Check whether the original damper is approved for use with the new spring and ride height.

• Separate rear suspension

  Verify whether the rear kit replaces the factory shock or retains it as a separate component.

• Incomplete or used kit

  Confirm whether dampers, mounts, and required hardware are missing before installation.

• Damaged damper

  Replace or service the affected unit according to the manufacturer’s instructions instead of fitting an extra shock beside a complete coilover.

How to Check Whether Your Coilovers Include Shocks

The most reliable way to confirm what you need is to identify the exact kit and compare its contents with the manufacturer’s installation instructions. Product photos can help, but they may show optional accessories or a setup for a different vehicle.

Start with the part number, vehicle year, make, model, trim, and drivetrain. Suspension fitment can vary between versions of the same car. A kit intended for one configuration may not fit another even when the model name is the same.

Next, read the parts list and installation guide. Look for a complete spring-and-damper assembly, any required top mounts, bump stops, dust boots, and instructions about reusing factory hardware. If the listing does not clearly state what is included, ask the seller or manufacturer before buying.

• Step 1: Identify the kit

  Record the exact part number and confirm that it matches your vehicle’s year, model, trim, and drivetrain.

• Step 2: Read the contents list

  Confirm that the kit includes dampers and springs for the suspension positions it claims to cover.

• Step 3: Review the installation guide

  Check which original parts must be removed, retained, or replaced.

• Step 4: Confirm missing parts

  Ask the supplier whether top mounts, bump stops, isolators, and fasteners are supplied or must be purchased separately.

• Step 5: Confirm the final setup

  Make sure the spring, damper, mounts, and ride-height range are approved for the intended vehicle and use.

Do Coilovers Need New Top Mounts?

Not always. Some coilover kits include new top mounts, while others are designed to reuse the original mounts. The answer depends on the vehicle and the kit’s design, so check the parts list before ordering extra hardware.

A top mount connects the upper end of the suspension assembly to the vehicle body. It may include a rubber isolator, a bearing, or other parts that help manage movement and noise. Front mounts on a strut-type suspension may also allow the assembly to turn with the steering.

Worn original mounts can cause clunks, excess movement, or noise. If the kit permits reuse, inspect the original mounts and replace damaged components as needed. If the instructions require a supplied mount, do not substitute an unapproved factory part.

Can You Add Extra Shocks to Coilovers?

You should not add a second shock absorber to a complete coilover assembly unless a vehicle-specific suspension design explicitly calls for it. Most passenger-car coilover kits are designed to use one damper at each specified suspension position. Adding another damper without engineering guidance can change suspension behavior and introduce mounting or clearance problems.

Some specialized vehicles use multiple dampers at one wheel, but those systems are designed around specific loads, motion ratios, mounting points, and damper settings. Their design does not mean that adding an extra shock to an ordinary street-car coilover is beneficial.

If a car bounces, feels unstable, or makes noise after a coilover installation, investigate the setup instead of adding parts. The cause may be incorrect damping, poor spring adjustment, insufficient suspension travel, worn mounts, loose hardware, or a damaged component.

Choosing the Right Coilover Setup for Your Car

Choose a coilover kit based on your vehicle, driving needs, and the range of adjustment you actually require. A street car used for daily travel has different needs from a car built for regular track sessions or off-road use. The most adjustable kit is not automatically the best choice for every driver.

For a daily driver, consider ride comfort, damper quality, corrosion resistance, replacement parts, and the manufacturer’s approved ride-height range. For track use, consider spring and damping options, heat management, available service support, and setup guidance. Off-road applications need parts designed for their suspension travel, loads, and operating conditions.

Do not select coilovers only by how low they can make the car sit. Excessive lowering can reduce available suspension travel, alter suspension geometry, and cause tires or components to contact the body. It can also affect headlight aim and alignment. Use the kit’s approved limits and check local vehicle requirements.

Installation and Safety Checks

Correct installation matters as much as choosing the right parts. Suspension assemblies store spring energy, and mistakes during removal or assembly can cause serious injury. Use the vehicle service manual, the coilover maker’s instructions, and the specified tools and procedures.

If the job requires spring compression, use suitable equipment and follow its instructions. Do not loosen a loaded spring assembly or improvise with unsafe tools. If you lack the training or equipment for the task, have a qualified suspension technician perform the work.

After installation, check that the assemblies are correctly seated, all required hardware is installed, and no brake hoses, ABS wires, tires, or other components bind or rub through the intended steering and suspension range. Fastener torque values must come from the relevant vehicle or kit instructions, not from a generic figure.

• Before installation

  Verify fitment, kit contents, service instructions, required tools, and specified fasteners.

• During installation

  Follow the correct lifting and support procedure and handle spring-loaded parts only with suitable equipment.

• After installation

  Check clearance, inspect the work, and obtain a wheel alignment when required by the vehicle and suspension manufacturer.

• Before normal driving

  Confirm that there are no loose parts, leaks, abnormal noises, or signs of tire contact.

Frequently Asked Questions

✦ Wrapping Up

Conclusion

You usually do not need separate shocks with coilovers because a complete coilover assembly already contains a spring and shock absorber. The main exception is a partial kit or a suspension design that retains separate dampers at certain wheels. The kit’s contents and vehicle-specific instructions determine which parts you need.

Before buying, confirm the exact fitment, review the included hardware, and check whether the original top mounts or other parts must be reused. After installation, verify the setup, inspect for clearance issues, and arrange a suitable wheel alignment. If a coilover leaks, bounces excessively, or feels unstable, have the system checked rather than adding an unapproved shock.