2008-2014 Subaru WRX Drivetrain Upgrades

The best drivetrain upgrades for a 2008-2014 Subaru WRX are the ones that remove the slack the factory left in the driveline. A short shifter with upgraded bushings tightens every gear change, a clutch delay valve delete gives you a consistent, predictable clutch pedal, and a driveshaft lockdown cuts the rear-end clunk under hard acceleration. Those three mods deliver the biggest driver-feel improvement per dollar on a WRX of this generation.

Drivetrain parts sit between the engine and the wheels, so they decide how connected the car feels rather than how much power it makes. The factory rubber bushings, soft shifter, and clutch delay valve are all tuned for comfort, which means vague shifts and a mushy pedal. Aftermarket hardware replaces the flexy bits with precise parts: shifter and linkage bushings, driveshaft and differential lockdown kits, clutch hydraulics, and stiffer transmission and pitch mounts. Nothing here requires a tune, and most of it installs in a driveway with hand tools.

Popular brands in this collection include Perrin, Kartboy, OVERTAKE, and Mishimoto — all proven names in Subaru chassis and drivetrain parts.

Browse related: Clutch kits, Shifters and bushings, Shift knobs, 08-14 WRX/STI parts, Perrin Clutch Delay Valve Delete, Kartboy Short Shifter and Bushing Combo, and our blog post on top WRX parts.

Do drivetrain upgrades require a tune?

No. Short shifters, shifter bushings, clutch delay valve deletes, and driveshaft lockdowns are all mechanical bolt-ons — no ECU changes needed.

Will these parts fit both the WRX and STI?

Some do and some don't, so check your year and model against each product's fitment notes before ordering — transmission and differential hardware often differs between WRX and STI.

How hard are these to install?

Most are driveway-friendly. A short shifter with bushings typically takes one to two hours with basic hand tools, and pitch mounts and driveshaft lockdowns are similarly straightforward.

Will aftermarket drivetrain parts void my warranty?

They can affect warranty claims on related components. See our guide on whether aftermarket parts void your warranty for the details.