Simply by replacing the standard downpipe with this larger bore, bell mouthed downpipe your Impreza will instantly feel the effects of big horsepower gains. This is as a result of removing the restrictive catalytic converter which improves exhaust gas flow and speeds up turbo spool time.
* CNC mandrel bent T304 grade polished stainless steel
* Fully TIG welded
* Large bell mouth opening for maximum flow.
* 3" (76mm) bore through to 2.5" exit at centre section exit
* Perfect fit with standard and aftermarket cat-back exhaust systems
* Lambda bosses fitted to accept original lambda probe
* Improves BHP and torque throughout the RPM range
Please note: this item will NOT pass an emissions and is sold for off-road use only - perfect for track days.
Fits Subaru Impreza 2001-2007 UK Spec Turbo Models inc. WRX and STi.