Upgrade your STI with a performance-driven, factory-fit catback exhaust featuring 3.5 single wall tips. Built to bolt directly to your OEM midpipe, this system delivers proven performance and refined sound without compromise.

Highlights:

• Dyno-Proven Gains: +32 ft-lbs of torque and +22 HP at the wheels over a Stage 1 tune

• Optimized Flow: 3 resonated main pipe splits into dual 2 rear circuits via a 2.25 Y-section for balanced exhaust flow

• Reduced Cabin Drone: Rear piping design lowers low-frequency noise at cruise while maintaining a bold tone at wide open throttle

• Direct Fit: Precision-designed for the 20192021 STI Sedan with standard EJ engine; not compatible with STI (SPT) dealer-installed midpipe

• Tip Style: 3.5 single wall stainless tips; 18+ other configurations availablesee vehicle page for more options

Premium Construction:

• Material: Full T304 stainless steel system, including flanges, tubing, and hangers

• Mufflers: Compact, high-efficiency design packed with ceramic wool for durability and sound control

• Welds: Hand TIG-welded for strength, flow, and reliability

• Includes: Full hardware kit for easy installation

Refined performance, aggressive sound, and race-proven engineeringengineered for drivers who demand more.