Invidia Gemini R400 Full Titanium Quad Tip Exhaust - 2015-2021 WRX, 2015-2021 STI

Piping diameter: 80mm
Tip diameter: 101mm

The Invidia R400 cat-back exhaust is a great option for those looking to get more performance out of their vehicle.  Invidia has designed this exhaust with a larger piping diameter over stock as well as creating a smoother path for the exhaust gas to flow through.  Both of these factors come together to decrease exhaust gas turbulence, increase horsepower and torque as well as increasing throttle response.  The R400 offers a louder more aggressive exhaust note than the Q300 but is not quite as loud as the N1 setup.

This specific variant of the R400 is manufactured from titanium to maximize weight savings coming in at under 40lbs!