GrimmSpeed 2-Bolt Ceramic Up-Pipe for 06-14 WRX/04-21 STI EJ25

Vehicle Fitment

• 2006-2014 Subaru WRX (EJ255, 2-bolt turbo flange)
• 2004-2021 Subaru STI (EJ25, 2-bolt turbo flange)

Fitment Notes

• For USDM Subaru EJ25 engines with the OEM-style 2-bolt header/turbo flange configuration only - 2002-2005 WRX (EJ205) uses a different flange and is not compatible

Features

• SEMA Certified design meeting modern emissions standards
• Heavy-duty 14-gauge 304 stainless steel tubing, 33% thicker than most competitors
• 321 stainless steel "Tuned-Bellow" flex joint for durability
• Ported flush pipe-to-flange connection for smooth, uninterrupted flow
• Black ceramic coating for heat resistance and a clean finish
• Includes GrimmSpeed Fire Ring multi-layer steel gaskets
• Developed in-house using FARO Arm scanning and SolidWorks CAD for precise fitment

Specifications

• Material: 304 Stainless Steel, 14-gauge (2.0mm)
• Finish: Black ceramic coating
• Inlet Diameter: 1.93 in
• Outlet Diameter: 1.72 in
• Flange: 2-bolt

Included Components

• 1x 2-Bolt Up-Pipe
• GrimmSpeed Fire Ring Multi-Layer Steel Gaskets
• Mounting Hardware

Product Description

The GrimmSpeed GRM.1099.1.BLK is a black ceramic coated 2-bolt up-pipe built for the 2006-2014 Subaru WRX and 2004-2021 STI EJ25 engines, replacing the factory up-pipe as one of the most effective early modifications for these platforms. Over time, factory up-pipes can degrade internally and restrict flow to the turbo, robbing power and increasing turbo wear - this up-pipe eliminates that bottleneck.

Built from heavy-duty 14-gauge 304 stainless steel with a 321 stainless "Tuned-Bellow" flex joint, it's engineered for long-term durability alongside real performance gains, with reported increases of up to 10 whp. The ported, flush flange connection keeps the flow path smooth, and the black ceramic coating adds heat resistance and a cleaner engine bay look. SEMA Certified for emissions compliance and developed entirely in-house for precise, repeatable fitment.