COBB Gearbox Crossmember Mount Subaru WRX (08–16) STI (08–17) CB-3199K

Fitment Information

• Subaru WRX STI / WRX Hatch (2008, 2009, 2010, 2011, 2012, 2013, 2014)
• Subaru WRX STI Sedan (2011, 2012, 2013, 2014, 2015, 2016, 2017)
  
• Subaru WRX Sedan (2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016)
  • Fits Manual Transmission Only
• Subaru WRX Sedan CVT (2015, 2016, 2017)
  • Fits Automatic Transmission Only

Specs & Features

• Drivetrain Lockdown: Replaces mushy factory rubber with 85a Durometer Polyurethane, drastically reducing transmission movement and "torque twist" during acceleration.
• Sharper Shifts: By stabilizing the transmission crossmember, you get crisper, more positive gear changes and improved throttle response.
• Chemical Proof: Unlike natural rubber that turns to mush when exposed to oil or coolant (a common Subaru reality), these bushings are Unaffected by Chemicals and will last the life of the car.
• NVH Control: Features a proprietary formula designed to absorb high-frequency vibrations, adding minimal Noise, Vibration, and Harshness compared to solid metal or cheap plastic mounts.
• Simple Install: Includes 4 Bushings engineered to re-use your OEM Crush Tubes, making this a straightforward swap for the home mechanic.

Product Description

Let's talk about "slop." Your Subaru's factory transmission crossmember is mounted with soft rubber bushings. They are designed for comfort, not performance. When you step on the gas, the transmission twists and moves around on that soft rubber before the power actually gets to the wheels. This Gearbox Cross Member Isolator Kit is the cure. By swapping those rubber donuts for high-grade Polyurethane, you essentially tighten the muscles of your car. The transmission stays planted, meaning instant power transfer and zero "slop" between gears.

The biggest fear with upgrading mounts is vibration. You don't want your dash rattling every time you stop at a red light. This kit uses a specifically formulated 85a Durometer urethane. In plain English? It’s the sweet spot. It is significantly stiffer than stock to handle the torque, but it still has enough "give" to soak up the annoying engine vibrations. It’s a quieter, higher-quality alternative that feels solid, not harsh.

Stock rubber bushings have a natural enemy: oil. And let's be honest, engine bays get dirty. Over time, oil leaks and road grime eat away at rubber, causing it to crack and fail. These polyurethane bushings are chemically inert. They laugh at oil, water, and coolant. You install them once, and you never have to worry about them again.

This kit is for the driver who wants a connected, responsive car without sacrificing daily drivability. It’s one of the most cost-effective modifications you can make to improve the "feel" of your Subaru. Stop wasting energy on flexing rubber—bolt this in and put the power to the ground where it belongs.