This GrimmSpeed up pipe is built from 304 stainless steel with 1/2-inch thick flanges and 14-gauge tubing, making it a durable upgrade for your turbocharged Subaru. The triple-layer flex joint and 1.92-inch diameter piping improve exhaust flow from cylinders 1 and 4, leading to quicker turbo response and better mid-to-high RPM performance.

An optional ceramic heat coating helps retain exhaust gas speed for even sharper throttle response. Fits select Subaru WRX, STI, and Legacy GT models from 2002 to 2019.