GrimmSpeed Catted Divorced Downpipe WRX / STI (2002-2007) Speedwell Wheels The ultra light weight 6061T6

The ultra light weight 6061T6 aluminum pulley body decreases rotational inertia and overall weight

4" split V exit

We are now offering straight and 90 degree MINI-cat O2 sensor spacers

which allows for faster revving as well

GrimmSpeed Catted Divorced Downpipe WRX / STI (2002-2007) Speedwell Wheels The ultra light weight 6061T6You are looking at a top of the line fully USA built Downpipe from GrimmSpeed for the 2002 2007 Subaru WRX and STI. All materials, engineering, R&D, fabrication are straight out of the USA. The tubing is CNC Mandrel Bent 304 Stainless Steel using their custom made bend dies which give you the best fit and performance possible. Please take a second to check out these 304 Stainless Steel flanges, a serious work of art. All 3 sides of the flanges are CNC