Perrin offers this replacement Downpipe for those looking to improve performance on their STI and are using the vehicle in an off-highway, off-road and/or for competition where the OEM unit won’t suffice.
No CARB Legal: This Product Cannot Be Ship To California!
Featuring a clever, two-piece design, for easy installation. The adjustable tail section will adapt to the OEM and aftermarket Catback exhaust systems. We included and additional O2 sensor behind the turbo to easy mount a wideband O2 sensor for AFR gauges or future tuning.
The divorce wastegate design channels the exhaust from the wastegate away from the turbo. This reduces turbulence, improves performance, and keeps any pulses from the wastegate from slowing the turbo itself.
Built from CNC mandrel bent 3" tubing and featuring a full stainless-steel catalyst, the Perrin downpipe features 304 stainless-steel for high corrosion and heat resistance up to 1800 degrees Fahrenheit.
Thick .500" CNC cut stainless-steel flanges will not warp and are designed to bolt up to your Perrin or OEM catback exhaust system.
The Perrin Downpipe comes with a brushed stainless-steel finish featuring TIG welding for precise, clean welds.
Proper ECU tuning is required for the safe operation of the engine with this product. Engine performance and fuel economy will also suffer without a tuning. Check all local, state and federal laws prior to purchase and the installation.
- Material: 304 Stainless steels
- Finish: Brushed
- (1) STI Front Section Downpipe
- (1) STI Rear Slip Connection
- (1) 3" Accu-Seal Clamp
- (1) O2 Sensor Plug
- (1) 3" Gasket
- (2) 3/8-24x2 Hex Bolts
- (2) 3/8-24 Nuts
- (4) 3/8 Washers
- (2) 3/8 Lock Washers
- (1) Anti-Seize Grease Packet
- Warranty & Instructions
California Residents, Proposition 65 Warning