Grimmspeed Top Mount Intercooler Y-Pipe Kit Black 2002-2007 WRX / 2004-2021 STI / 2004-2008 Forester XT / 2004-2006 Baja XT

The GrimmSpeed TMIC Y-Pipe uses a fully redesigned, single-piece aluminum casting that’s CNC-machined to ensure perfectly flat flanges and repeatable, leak-free fitment. Inspired by the OEM flow path, GrimmSpeed engineers optimised the internal geometry to evenly distribute charge air across the intercooler’s end tank for improved efficiency.

The included 5-ply silicone couplers are fiber-reinforced to prevent ballooning under boost while still offering the flexibility needed to isolate the TMIC from engine movement. Each 90° turbo outlet coupler is slightly oversized so it can be trimmed to fit a variety of stock-location turbos.

Whether you're upgrading a WRX to an STI-style or GrimmSpeed TMIC, or refreshing your STI setup, this kit delivers improved flow, clean fitment, and a noticeable quality upgrade. Each kit includes a 90° turbo outlet coupler, throttle-body coupler, and stainless steel BREEZE high-torque clamps.

Quick Specs

• One-Piece Aluminum Casting – Provides precise fitment and smooth, uninterrupted airflow
• Thick, Machined Flanges – Flat, durable sealing surfaces that resist cracking from heat or vibration
• 5-Ply High-Grade Silicone Couplers – Reinforced, smooth-bore construction for maximum flow and minimal restriction
• Heat-Resistant Reinforcement – Maintains shape even under high boost
• Stainless Steel High-Torque Clamps – Strong, corrosion-resistant, and easy to adjust
• Black Zinc-Coated Hardware – A clean upgrade over aging OEM fasteners

Special Fitment Note:

• Supported fitments include only those vehicles running OEM STI and GrimmSpeed Top Mount Intercoolers. The elbow coupler is sized to fit multiple turbo setups, some trimming may be required.

Fitments:

• 2004-2021 Subaru STI (w/factory or GrimmSpeed TMIC only)
• 2002-2007 Subaru WRX (w/STI or GrimmSpeed TMIC only)
• 2004-2008 Subaru Forester XT (w/STI or GrimmSpeed TMIC only)
• 2004-2006 Subaru Baja XT (w/STI or GrimmSpeed TMIC only)