Updated October 2026
For the 2022 and newer WRX, the best engine mount upgrade is the IAG FA24 engine mount set, which comes in four firmness levels: Comfort 55A for daily drivers, Street 75A for spirited street driving and occasional track use, Competition 90A for harder use, and Race solid steel for dedicated race builds. Every set includes brackets and uses interchangeable bushings, so the firmness can be changed later without replacing the mounts. On any WRX or STI, stiffer mounts sharpen throttle response and shifting at the cost of more vibration, so choose the softest level that controls the movement you feel.
Engine mounts are one of the most overlooked upgrades on the Subaru WRX and Subaru STI, yet they play a big role in how the car feels, shifts, and puts power down. This guide covers how mounts work, which firmness fits which kind of driving, and when the upgrade makes sense. For the bigger build picture, the WRX performance upgrades guide shows where mounts fit alongside other modifications.
Best WRX Engine Mounts at a Glance
IAG’s FA24 mount sets for the 2022 and newer WRX share the same mount and bracket design. The only difference is the bushing firmness, measured in durometer, where a higher number means a stiffer bushing.
| IAG FA24 mount set | Bushing | Best for | Vibration |
|---|---|---|---|
| Comfort Series | 55A | Daily drivers who want less engine movement with near-stock comfort | Lowest |
| Street Series | 75A | Spirited street driving and occasional track days | Moderate |
| Competition Series | 90A | Hard street use and regular track driving | Higher |
| Race Series | Solid steel | Dedicated race and high-power builds | Highest |
Best Engine Mounts for the 2022 and Newer WRX
All four IAG FA24 sets fit the 2022 and newer WRX with the FA24F engine and include two mounts, eight bushings, mounting brackets, and hardware, so there is nothing extra to source. The mounts use billet aluminum carriers and plated steel brackets. Because the bushings are interchangeable, owners can start soft and step up later by buying a bushing kit instead of a whole new set.
IAG Comfort Series 55A: Best for Daily Drivers
The Comfort Series is the softest option, built for owners who want a more connected feel than stock without noticeably more vibration. It suits commuters and lightly modified cars.
IAG Street Series 75A: Best All-Around Choice
The Street Series is tailored for spirited street driving and occasional track use, and IAG rates its 75A bushings as 5 to 7 percent stiffer than Subaru’s Group N mounts, which sharpens throttle response and power transfer while staying livable on the street. For most modified 2022 and newer WRX builds, this is the level to start with.
IAG Competition Series 90A and Race Series: Best for Track and High Power
The Competition Series uses 90A bushings that cut engine movement further under heavy acceleration, with more vibration in return. The Race Series uses solid steel bushings and is an all-out racing mount for high-power builds where comfort does not matter.
Engine Mounts for Older WRX and STI
IAG also makes Street Series engine mounts and a Street Series pitch stop mount for the 2002 to 2020 WRX and STI. The pitch stop controls the engine’s forward and back rocking and is often the first drivetrain mount owners upgrade on these cars. Check availability for older-model mounts with the shop before ordering.
What Do Engine Mounts Actually Do?
Engine mounts secure the engine to the chassis while absorbing vibration. Factory mounts prioritize comfort, which means they allow a noticeable amount of engine movement under load.
When you accelerate, shift, or build boost, the engine physically moves. That movement can soften throttle response, make shifts feel less precise, and add a lurch during hard launches. Upgraded mounts reduce that movement, keeping the drivetrain more stable and making power delivery feel more direct. The engine mounts and performance guide covers what changes in more detail.
Comfort vs Stiffness: Choosing the Right Mount
Factory mounts are soft to limit vibration and noise, but they let the engine move. Stiffer bushings limit that movement for a more direct feel, with more vibration and noise passed into the cabin. The stiffer the mount, the bigger both effects become.
Choosing the right level depends on how the car is used. Soft performance mounts suit daily drivers, medium-stiff mounts suit spirited street cars with occasional track time, and solid mounts belong on dedicated race builds where vibration is not a concern.
How Engine Mounts Affect Shifting and Drivability
One of the biggest benefits of upgraded engine mounts is shifting feel. With less engine movement, gear changes feel more consistent and precise, especially during quick shifts under load.
That difference becomes more noticeable alongside a clutch upgrade. Our best clutch upgrades for WRX and STI cover how clutch choice and drivetrain stability work together, and the post on when it is time to upgrade your clutch covers the warning signs.
When Should You Upgrade Engine Mounts?
Engine mounts are rarely the first modification, but they become more important as power increases. Consider upgrading if:
- You feel the engine lurch under acceleration or when lifting off the throttle
- Shifting feels inconsistent or sloppy
- You are adding power with bolt-on mods, a tune, or a turbo upgrade
- You want a more connected driving experience
Torque climbs quickly with boost, which is why mounts matter more on turbocharged builds. Our boost safety guide explains how torque rises with boost, and the boost control guide covers how forced induction loads the drivetrain.
Engine Mounts and High-Performance Builds
As builds move toward higher power, drivetrain stability matters more, since engine movement under big torque makes power delivery less consistent and control less precise during aggressive driving.
Transmission mounts are a natural companion to engine mounts, and the transmission mounts guide for WRX and STI explains when they become necessary. The WRX engine reliability guide and the STI engine reliability guide cover the supporting modifications that protect a build under sustained power. For builds pushing well beyond stock, IAG short blocks make sure the engine itself can handle the load.
WRX and STI Engine Mount FAQ
Do engine mounts make a difference on a WRX?
Yes. Upgraded mounts reduce engine movement, which sharpens throttle response, makes shifts feel more precise, and reduces lurch during hard acceleration. The difference grows as power increases.
What are the best engine mounts for a 2022 WRX?
The IAG FA24 engine mount sets, chosen by firmness: the Street Series 75A suits most modified street cars, the Comfort Series 55A suits daily drivers, and the Competition 90A and Race solid sets suit track and race builds.
Will stiffer engine mounts cause more vibration?
Yes. Stiffer bushings pass more engine vibration and noise into the cabin. Comfort and Street level mounts keep that increase small, while solid race mounts make it very noticeable.
Can I change mount stiffness later?
With the IAG FA24 sets, yes. The bushings are interchangeable, so you can buy a bushing kit to go softer or stiffer instead of replacing the whole mount set.
Are solid engine mounts good for a daily driver?
Usually not. Solid mounts transmit a lot of vibration and are meant for dedicated race builds.
Should I upgrade the pitch stop and transmission mounts too?
Often, yes. The pitch stop controls the engine’s rocking motion and transmission mounts control drivetrain movement, so upgrading them together gives the most consistent feel.
Find the Right Engine Mounts for Your WRX or STI
Engine mounts may not be the most visible upgrade, but they have a big effect on how a WRX or STI feels and performs. Wrench Masters Auto sells these mounts and works on Subaru WRX and STI builds at its shop in St. Petersburg, Florida, so fitment and firmness questions can go straight to people who handle these cars every day. Explore the full range of performance engine mounts for WRX and STI, and pair them with the right supporting parts, including a tune covered in our EFI tuning guide and exhaust options in the WRX exhaust upgrades guide.
