GrimmSpeed Catted Divorced Downpipe 2002-2007 WRX / STI
We are extremely proud to introduce our Catless Divorced Downpipe for Subarus. It's safe to say, the years our engineering department spent on this downpipe have paid off. You are looking at a top-of-the-line fully USA built Downpipe. All materials, engineering, R D, fabrication, etc are straight out of the USA. The tubing is CNC Mandrel Bent 304 Stainless Steel using our 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 Machined to perfection. If that isn't over-the-top enough for you, check out the new 3-D Contour Flange. Instead of the exhaust hitting a flat wall like on most divorced downpipes, we have spent a lot of engineering(and machining) hours creating a nice smooth transition through the wastegate port for the ultimate in boost control for you. The outlet of the downpipe has a standard 2-Bolt flange that will mate up with most aftermarket cat-backs on the market. We have also included a wideband O2 bung for you if needed. Having a secondary o2 Bung saves you time and money because you will not have to pay a shop to install one for you. Replacing your factory catalytic converter sometimes causes a converter efficiency check engine light. You can either use tuning to delete this CEL or you can use a mechanical fix.
- Proudly made in the USA Design, Materials and Fabrication
- Innovative 3-D Contour Flange (Limited models only)
- Arm Designed We are at the leading edge of new product design hardware
- Flanges Fully CNC Machined (Limited models only)
- 2 x O2 Bungs for factory sensor and aftermarket wideband AFR
- Divorced Wastegate for Optimal flow
- High-flow, 300 cell, metallic substrate catalytic converter
- GrimmSpeed Gaskets Included A $40 Value!
- 1 x GrimmSpeed Catted Downpipe
- 1 x GrimmSpeed Downpipe to Turbo Gasket 028001
- 1 x GrimmSpeed Downpipe to Midpipe Gasket 022001
- 1 Set of New Bolts, Washers and Nuts for Downpipe to Midpipe
- 1 x O2 bung Threaded Cap (to be used if no wideband sensor is installed)
2004-2008 Forester XT