Invidia [08-14 WRX, 08-21 STI] High Flow Cat w/ Extra 02 Bung Downpipe Featured Products PERRIN 25mm Bar Hole #1

PERRIN 25mm Bar Hole #1 550% Stiffer than 15mm OEM Bar

4 Analog Inputs for additional Sensors or Switches

Shift knob height raised from 35 mm to 60 mm over OEM

Material: 6061 T6 aluminum

If you've ever looked inside an intake manifold

Invidia [08-14 WRX, 08-21 STI] High Flow Cat w/ Extra 02 Bung Downpipe Featured Products PERRIN 25mm Bar Hole #1Invidia offers both catted and catless divorced style downpipes that are designed with a separator plate between the turbine and wastegate exhaust streams. Divorced style downpipes reduce exhaust turbulence for exceptional exhaust flow and performance. Every Invidia downpipe features 3" diameter stainless steel piping, 1 2" thick flanges, and a cast upper mouth section. Please note that without engine management such as the Cobb Accessport, a catless