GrimmSpeed 2-Bolt Up-Pipe (Stainless Steel) - EJ25 Engines (Inc. 2004-2021 Subaru STI / 2006-2014 Subaru WRX)

GrimmSpeed 2-Bolt Up-Pipe (Stainless Steel) - For EJ25 Engines

The GrimmSpeed 2-Bolt Up-Pipe for EJ25 engines is now officially SEMA Certified (SC-GRM01-0145), with CARB EO approval currently in progress. This makes it a smart option for enthusiasts who need a street-legal solution without sacrificing performance. Whether you're building a daily driver or a high-performance machine, this up-pipe is engineered to deliver results.

 

High-Performance Up-Pipe Upgrade

The GrimmSpeed 2-Bolt Up-Pipe is a top-tier performance upgrade for EJ25-powered Subarus. As a SEMA Certified component, it’s built to improve boost response, enhance durability, and meet emissions compliance. Whether you’re building a track car or refining your daily driver, this up-pipe delivers exceptional results in both performance and reliability.

 

Engineered for Perfect Fit and Finish

Using in-house FARO Arm scanning and SolidWorks design software, GrimmSpeed developed this up-pipe with precision fitment in mind. It’s crafted to mate seamlessly with OEM 2-bolt headers, featuring ½" CNC-machined flanges for a secure seal. Each kit includes multi-layer Fire Ring gaskets and zinc-coated hardware, so there’s no need for additional parts. Available in raw stainless steel or black ceramic coating, the up-pipe also offers optional thermal management and a sleek under-hood look.

 

Built Tough for Demanding Applications

Constructed with 14-gauge 304 stainless steel tubing and a durable 321 stainless steel flex joint, this up-pipe is designed to withstand extreme heat and stress. The mandrel-bent tubing ensures smooth airflow, while TIG welds—both inside and out—guarantee strength and leak-free performance. Certified welders assemble every unit, ensuring each piece meets the highest standards for quality and endurance.

 

Improved Boost and Turbo Response

Expect quicker spool times—typically 300 to 400 RPM sooner—thanks to improved flow and reduced restriction. This translates to faster throttle response and a more responsive turbo, giving you sharper performance in both street and track environments.

 

DETAILS:

• ½” CNC Milled 304 Stainless Steel Flanges
• 14-Gauge CNC Mandrel Bent 304 Stainless Tubing
• 321 Stainless Steel Interlocking Flex Joint
• Raw Stainless Steel Coating Options
• Fire Ring Multi-Layer Steel Gaskets Included
• Full Installation Hardware Included
• No Tune Required
• SEMA Certified (SC-GRM01-0145)

 

Fitments:
2004-2021 Subaru STI

2006-2014 Subaru WRX

2006-2013 Subaru Forester XT

2007-2009 Subaru Legacy GT

2007-2009 Subaru Outback XT