The Borla header for the EJ powered Subaru WRX, STI, and Legacy GT models features 1.625" primary exhaust tubing leading to a 2.25" collector where it take the short trip through the up pipe and to the turbo. The header is a bolt on part without any modification necessary. The runners are a smoother flowing design to promote better exhaust flow ability and more power and torque. Expect to see a decrease in spool time for your turbo and horsepower gained throughout the entire power curve.
Borla Limited Warranty
