About this product
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)
Description supplied by Subimods.com through its current Shopify listing. Product, performance, and health claims are the seller’s and have not been independently verified by StorkScout.
