Grimmspeed 2-Bolt Up-Pipe | EJ25 (GRM.1099.1)

2-Bolt Up-Pipe for EJ25 by Grimmspeed

Adding a properly designed, thoroughly tested up-pipe is one of the most effective early mods you can make to your Subaru. GrimmSpeed's goal was to create a 2-bolt up-pipe that checks every box: precise fitment, long-term durability, strong performance gains — all while meeting modern emissions standards. The result is a SEMA Certified component engineered to deliver on all fronts.

This up-pipe was developed entirely in-house using a FARO Arm and advanced SolidWorks CAD software, giving Grimmspeed complete control over every detail — from material selection to final fitment. The result is an OEM-header-compatible up-pipe with dead-on accuracy, thanks to ½" CNC-milled stainless-steel flanges and reverse-engineered tolerances based on real-world data.

Each unit is packaged with a set of proven GrimmSpeed Fire Ring multi-layer steel gaskets and corrosion-resistant zinc-coated hardware — no extra parts or trips to the parts store required. Everything you need is in the box

Please Note: SEMA Certified – SC-GRM01-0145 for listed fitments, currently in the process of obtaining a CARB EO #.

Features

• Flex Joint – 321 Stainless Steel "Tuned-Bellow" Design
• Tubing Thickness – Heavy Duty 14 Gauge 304 Stainless Steel
• Flanges – ½" 304 Stainless Steel CNC Milled

Benefits

• Reduced Turbo Lag
• Spool ~300-400 RPM quicker
• No Tune Required

Applications

• 2004-2021 Subaru STI
• 2006-2014 Subaru WRX
• 2006-2013 Subaru Forester XT
• 2007-2009 Subaru Legacy GT
• 2007-2009 Subaru Outback XT

What's In The Box?

• 1 - GrimmSpeed 2-Bolt EJ Up-Pipe
• 1 - GrimmSpeed Up-Pipe to Turbo Gasket
• 1 - GrimmSpeed Lower Up-Pipe Gasket
• 5 - M10x1.25 Turbo Mounting Studs
• 2 - M10x1.25x40mm Yellow Zinc Bolts
• 2 - M10x1.25 Serrated Flange Yellow Zinc Nuts
• 2 - M10 Yellow Zinc Washers
• 5 - M10x1.25 Yellow Zinc JIS Flange Nuts
• 1 - GrimmSpeed Sticker

References

• Installation Instructions

Warranty

• Limited Manufacturers Warranty