Grimmspeed Top Mount Intercooler Raw 2015-2021 WRX

Upgrade your FA20DIT-powered WRX with the GrimmSpeed Top Mount Intercooler Kit—built to outperform the undersized plastic OEM unit in every way. Featuring cast aluminum end tanks, a high-flow bar-and-plate core, and precision TIG-welded construction, this intercooler is engineered to keep charge temps stable even under increased boost and aggressive driving. Lower temps mean reduced knock, improved reliability, and consistent power.

Quick Specs

• 13.1" x 10" x 3.75" Crossflow Core – Optimized for excellent heat transfer with minimal pressure drop
• Cast Aluminum End Tanks – Machined for perfect splitter fitment
• 5-Ply Reinforced Silicone Couplers – Built to handle high heat and high boost
• Fully-Integrated 2-Piece Splitter – Directs airflow across the full core width
• 1/8 NPT Water/Meth Bung – Cast, CNC-tapped, and plugged for future use
• Vibration-Isolating Mounting – Reuses factory mounts to reduce stress and extend lifespan

Key Advantages

• High Efficiency with Low Restriction – Designed to cool without choking airflow
• Innovative Splitter System – Purpose-built for the larger GrimmSpeed core
• Optional Charge Pipe Upgrade – Add later or pair from the start
• Locally Designed & Manufactured – Ensures consistency, quality, and clean welds

Precision Construction

Each intercooler uses two unique, Minnesota-made cast end tanks—one feeding hot air into the core, and one delivering cooled air to the throttle body. After inspection, they’re TIG welded to a high-density bar-and-plate core, pressure tested, and sealed. The included 5-ply silicone couplers maintain shape under extreme temperatures, and the powdercoated aluminum splitter mounts cleanly using stainless hardware.

Performance Tested

In back-to-back comparisons with the OEM WRX TMIC and a top competitor, GrimmSpeed’s TMIC showed superior cooling efficiency, lower temperature deltas, and reduced pressure drop—resulting in more consistent power delivery under real-world driving.