Best Engine and Transmission Mounts for the WRX and WRX STI: 5 Top Picks Compared
The best engine and transmission mounts for a WRX or WRX STI depend on how much vibration you will trade for control: Subaru's Group N set ($199) is the factory-engineered step up for 2002–2014 cars, Perrin's V2 engine mounts ($313.65) and transmission mount ($299.20) cover the widest year range in this guide, Cusco's engine/transmission set ($328.50) is the matched kit for the STI, and Torque Solution's VA engine mounts ($313) serve the 2015–2021 WRX directly. Every mount below was verified live in our catalog today.
What Stiffer Mounts Actually Change
A flat-four moves a lot on soft factory mounts: the engine rocks under throttle, the transmission follows, and the shifter — which is linked to the gearbox, not the body — moves with it. Stiffer mounts cut that movement, which sharpens throttle response feel and shift precision, and they stop tired, torn factory mounts from letting the drivetrain wander. The price is vibration: more of the engine's shake reaches the cabin, most noticeably at idle. Rubber-based upgrades like the Group N set keep that trade mild; solid billet mounts remove the trade-off's cushion entirely and belong on competition cars. Mounts work as a system with the pitch stop covered in our pitch stop guide — doing all of them together gives the coherent result.
1. Subaru Group N Engine Mount Set — $199
Subaru [02-14 WRX, 04-14 WRX STI] Group N Engine Mount Set — $199. Subaru's own motorsport-parts answer: stiffer rubber mounts engineered by the factory, listed for 2002–2014 WRX and 2004–2014 WRX STI. Group N parts are the connoisseur's choice on the GD and GR generations — a real reduction in drivetrain movement with the least vibration penalty in this guide, and OEM fitment by definition.
2. Torque Solution Engine Mounts, VA WRX — $313
Torque Solution [15-21 WRX, 14-18 Forester XT] Engine Mounts — $313. The direct pick for the VA-generation WRX: Torque Solution's engine mounts listed for the 2015–2021 car (and its Forester XT sibling). VA owners replacing soft or failed factory mounts get a firmer, streetable result without mixing parts from other generations.
3. Perrin V2 Engine Mounts — $313.65
Perrin [02-25 WRX, 04-21 STI, 13-25 BRZ, 13-16 FR-S, 17-20 86, 22-25 GR86] V2 Engine Mounts — $313.65. The widest coverage in this guide — one Perrin V2 mount design spanning 2002–2025 WRX, 2004–2021 STI and the BRZ/86 family. Perrin's mounts are the established polyurethane route: noticeably firmer than stock, engineered as a complete kit, and the default recommendation for a tuned street car that still commutes.
4. Perrin Transmission Mount — $299.20
Perrin [02-25 WRX, 04-21 STI, 05-09 LGT, 04-08 FXT] Transmission Mount — $299.20. The other half of the system: Perrin's transmission mount, listed across 2002–2025 WRX and 2004–2021 STI. Owners who change only engine mounts often find the gearbox still moving on its soft factory mount; this is the matching fix, and pairing it with pick three is the coherent Perrin setup.
5. Cusco Engine / Transmission Mount Set — $328.50
Cusco [02-05 WRX, 04-05 STI, 15-21 STI] Engine / Transmission Mount Set — $328.50. Cusco sells the engine and transmission mounts as one matched set, listed for 2002–2005 WRX, 2004–2005 STI and — the application most buyers here will use — the full 2015–2021 STI run. A matched set guarantees the stiffness balance front-to-back is what the maker intended, rather than a mix-and-match experiment.
The Honest End of the Scale
Torque Solution also lists solid billet aluminium engine and transmission mounts ([02-14 WRX, 04-21 WRX STI] Solid Billet Aluminum Engine and Transmission Mounts — $304) — no elastomer at all. They are superb on a track car and punishing in a daily driver, and we list them here so the full scale is visible rather than to recommend them for the street. Place mounts in your build order with the VA modification guide, and note our own chassis part for the same car: the JDMuscle [15-21 WRX/STI] Front Member Brace — $119.