Invidia R400 Cat Back Exhaust - Straight Cut Titanium Blue Tips - Subaru WRX/STI 11-21 (Sedan) HONDA_EP3 see part number 20-0551-03

see part number 20-0551-03

Reduces oil consumption — effectively raises octane

shim installation

The only change made to the vehicle between testing is the swap from a stock intake with a new clean air filter to the IE Cold Air Intake Kit

PDK Relearn instructions are located below

Invidia R400 Cat Back Exhaust - Straight Cut Titanium Blue Tips - Subaru WRX/STI 11-21 (Sedan) HONDA_EP3 see part number 20-0551-03Invidia's most popular exhaust system. Specifically designed to fill the sound gap between the Q300 and N1 system, the R400 produces a unique, agressive note while minimising harsh cabin noise (particularly at highway speeds). The R400 muffler was designed using years of experience from Invidia's engineers to allow the perfect balance between unrestricted exhaust gas flow and sound dampening. This exhaust system will provides a pronounced exhaust note