GrimmSpeed Downpipe- 3in Catted - Limited - 08-21 STI, 08-14 WRX, 05-09 LGT/OBXT, 09-13 FXT
You are looking at a top-of-the-line fully USA built Grimmspeed Downpipe. All materials, engineering, R&D, fabrication, etc 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 which are a serious work of art. All 3 sides of the flanges are CNC Machined to perfection. The outlet of the downpipe has a standard 3” 2-Bolt flange that will mate up with most aftermarket cat-backs on the market. They have also included a wideband O2 bung for you if needed. Having a secondary o2 Bung give you a provision if you want to use a wideband O2 gauge.
During their design, they utilize their in-house 7-axis FARO™ Arm to obtain extremely accurate fitments. What this means is, they scan all of the mounting points on the car, bring those into their CAD software, and then begin designing the pipe around their scanned OEM data in their Solidworks CAD software. Most downpipes(or exhaust pipes for that matter) on the market are designed using fixtures. Essentially their competitors will create a welding fixture by handoff of an OEM part. This leads to a ton of chances for things to be off. They don't take those chances. They have spent the capital on R&D equipment where others have not.
New hardware and gaskets will be included to make this downpipe ready for the installation.
- Proudly made in the USA - Design, Materials and Fabrication
- Innovative 3-D Contour Flange (Limited models only)
- Flanges Fully CNC Machined (Limited models only)
- FARO Arm Designed - We are at the leading edge of new product design hardware
- 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
- NOT COMPATIBLE with 5EAT Automatic Transmission
- Once you have added our downpipe to your vehicle, you must be tuned. Replacing your factory catalytic converter sometimes causes a ‘cat converter efficiency’ check engine light. You can either use tuning to delete this CEL or you can use a mechanical fix. GrimmSpeed aftermarket downpipes modify OEM emissions control devices and are intended only for off-road racing applications.
- You will need to slightly adjust the divider tab to fit a VF40 turbo. It’s a very simple process but please contact our customer service representatives if you have any questions.
2008-2020 Subaru STI & Type-RA
2008-2014 Subaru WRX
2009-2013 Subaru Forester XT
2005-2009 Subaru Legacy GT & Spec. B
2005-2009 Subaru Outback XT