The GrimmSpeed catted J-pipe is a meticulously engineered pipe with an innovative flange design, single-piece construction, excellent ground clearance, and fitment with superb quality and craftsmanship.
The performance of the J-Pipe was verified on our 2015 WRX using the following method. Our tuned baseline run is the same run that we used in showing the boost control performance of the GrimmSpeed 3-Port Solenoid. We then installed the J-Pipe and retuned the car, using the exact same tuning methodology to ensure consistency. This ensured a real apples-to-apples comparison between the stock J-Pipe and the GrimmSpeed unit. The results showed a gain of 26.7whp (14.1%) and 19.8wtq (9.0%)—the percentage gains should be the focus here. From a completely stock vehicle, users can expect a gain of around 45whp (27%) and 70wtq (41%) with the installation of the GrimmSpeed J-Pipe and a custom tune.

FEATURES

• Innovative Turbo Flange Design
• Exact fitment
• Robust construction
• Easy to install
• Made in the USA
• Maximized ground clearance and minimized flow restriction./li>
• Custom Stainless Turbo Studs
• Standard 3rd O2 Bung
• Grounding Strap Mount
• 300 Cell Metallic Substrate Catalytic Convertor

Manufacturer's Part Number	007103
CARB Approved	No