Each piece uses 3D CNC ported 1018 cold rolled steel flanges mated to 304 stainless 3" tubing. All products are handmade and checked for perfect fitment.
The J-pipe / midpipe assembly is 2 pieces, giving customers the ability utilize the factory catalytic converter by using only the midpipe. A catted J-pipe will not be offered because there is no way for us to include a high quality cat for an affordable price. Most aftermarket cats offered with other J-pipe assemblies are inferior compared to the OEM cat. Using the upper J-pipe will make the exhaust system catless.
A premium stainless flex section is used to allow movement in the exhaust to reduce the risk of cracking
Optional additional o2 bung for customers using a wideband sensor.
- Increased spool
- Average 10-20 hp and tq gain throughout the midrange
- 13 whp / 18 ft/lbs tq at peak
Midpipe v2 (1 Piece Design)
- All gaskets and hardware to bolt up to the factory primary cat
Dyno numbers are based off of a bone stock 2015 WRX with ETS 3" cat-back exhaust and Cobb Stage 1 reflash on an AWD Dynojet on the same day with 3 back-to-back pulls with each mod to check for consistency.
*Offroad Use Only
Grimmspeed Factory exhaust adapter sold separate