Grimmspeed Catted Downpipe | Subaru WRX / STI 08+ & LGT 2005-2009 (007091)
Grimmspeed Catted Downpipe for Subaru WRX / STi 2008-2014
A downpipe is one of the first modifications that should be done on your car, as the OEM downpipe contains two very restrictive catalytic converters. Replacing these with our single high-flow unit will dramatically improve performance potential while maintaining the use of a catalytic converter.
For those looking to take the finest downpipe one step further and wring out every last ounce of performance, we offer our 'Limited' line of downpipes. Limited downpipes use flanges made of the very same 1/2" 304L Stainless material, but are fully machined with recesses for each tube as well as a beautiful 3D contour to smoothly transition the irregular shape of your internal wastegate outlet into our divorced tube for tighter boost control. In addition to the machined flanges, limited downpipe tubing material has a brushed finish, for a more uniform, refined appearance.
NOTE: 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.
- Proudly made in the USA - Design, Materials and Fabrication
- Innovative 3-D Contour Flange (Limited models only)
- FARO Arm Designed - We are at the leading edge of new product design hardware
- Flanges Fully CNC Machined (Limited models only)
- 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!
- 2008-2014 WRX
- 2008-2017 STI
- 2005-2009 Legacy GT (Non-VF46, Manual Trans Only)
- 2009-2013 Forester XT
What's In The Box?
- O2 Bung Plug
- Manufacturer Standard Warranty
THIS PART MAY NOT BE USED IN VEHICLES USING PUBLIC HIGHWAYS. THIS PART IS FOR USE ONLY IN OFF ROAD COMPETITION RACING VEHICLES. ANY USE OF THIS PART IN ANY OTHER VEHICLE OR FOR ANY OTHER PURPOSE MAY SUBJECT YOU TO FINES AND PENALTIES FOR VIOLATION OF FEDERAL AND/OR STATE LAW, WILL VOID ANY WARRANTY FROM MODERN AUTOMOTIVE PERFORMANCE AND MAY VOID YOUR VEHICLE'S WARRANTY.
It is your responsibility to comply with all applicable federal, state and/or local laws relating to the use of this part. Modern Automotive Performance hereby makes no representation or warranty as to the compliance of this part with federal, state and/or laws and disclaims any liability resulting from the failure to use this part in compliance with all applicable federal, state and/or local laws.