GrimmSpeed Top Mount Intercooler Y-Pipe Kit 2002-2007 WRX / 2004-2021 STI

Just bought an STI TMIC that requires an STI Y-pipe to fit? Want to replace your chewed up and leaking couplers? Maybe you’re just looking to freshen up your engine bay with a touch of GrimmSpeed style. Note: This kit is ONLY for use with cars equipped with an STI intercooler or a GrimmSpeed intercooler.

Quick Specs

• One-Piece Aluminum Casting – Precise fit and smooth flow without distortion
• Thick Flanges – Prevent heat and vibration from cracking casting
• Machined Flanges – Ensures a perfect fit, leak-free seal, every time
• 5-Ply High-Grade Silicone Couplers – Smooth interior to maximize airflow and minimize restriction
• Heat Resistant Reinforcement – Couplers keep their shape, even at high boost levels
• Stainless Steel High-Torque Clamps – Rust-proof construction with smooth operation
• Black Zinc Coated Hardware – Ditch those nasty OEM fasteners

Design

The GrimmSpeed TMIC Y-pipe has been completely redesigned to make use of a single-piece aluminum casting that’s machined after the casting process to ensure perfectly flat flanges and precise fitment every single time. With inspiration from the OEM Y-pipe, GrimmSpeed engineers set out to balance the airflow through the Y-pipe to evenly distribute charge air across the inlet end tank on your Top Mount Intercooler. The 5-ply silicone couplers are fiber reinforced to prevent distortion in high boost scenarios but offer mobility and flexibility, isolating your TMIC assembly from the vibrations of your engine. Each 90-degree coupler is slightly oversized on the turbo side so that it can be trimmed-to-fit with a number of different stock location turbos. This Y-pipe is exactly what you need in order to upgrade your WRX TMIC to an STI or GrimmSpeed TMIC. If you’ve got an STI, the GrimmSpeed y-pipe offers a fresh look and better flow distribution. All kits come with replacement 90-degree turbo outlet couplers and throttle body couplers.

Fitments

• All 2002-2007 WRX (with STI or GrimmSpeed intercooler ONLY)
• All 2004-2021 WRX STI.
• 2004-2008 Forester XT (with STI or GrimmSpeed intercooler ONLY)