GrimmSpeed TMIC Splitter – 2006–2007 Subaru WRX / STI (GD) | Top-Mount Intercooler Hood Scoop Airflow

Maximize the cooling efficiency of your 2006–2007 Subaru WRX or STI's top-mount intercooler with the GrimmSpeed TMIC Splitter — a precision-engineered airflow management component that directs cold air from the factory hood scoop directly into the top-mount intercooler (TMIC) core, rather than allowing it to mix with hot engine bay air. By sealing the gap between the hood scoop and the intercooler and splitting airflow efficiently into the TMIC, the GrimmSpeed splitter significantly improves intercooler cooling efficiency — reducing intake air temperatures, improving charge density, and delivering more consistent boost performance on the EJ20/EJ25 platform. A foundational upgrade for any GD WRX or STI running the factory top-mount intercooler.

Key Features

• TMIC Splitter – Directs Hood Scoop Air Into Intercooler Core: The GrimmSpeed TMIC splitter seals the gap between the factory hood scoop and the top-mount intercooler, directing incoming cold air from the hood scoop directly into the TMIC core — preventing hot engine bay air from mixing with the incoming cold air charge. The result is significantly improved intercooler cooling efficiency and reduced intake air temperatures
• Reduced Intake Air Temperatures – More Consistent Boost Performance: By maximizing the volume of cold hood scoop air reaching the TMIC core, the splitter reduces charge air temperatures entering the engine — denser, cooler charge air means more consistent power output, reduced knock risk, and improved boost performance across repeated pulls
• 2006–2007 WRX & STI (GD) Specific: Engineered specifically for the 2006–2007 Subaru WRX (EJ20) and STI (EJ25) on the GD chassis with the factory top-mount intercooler setup — verify your specific GD WRX/STI model year and intercooler configuration before ordering. Not compatible with front-mount intercooler (FMIC) conversions
• GrimmSpeed Quality: Manufactured by GrimmSpeed — one of the most respected Subaru performance parts manufacturers, known for precision-engineered, track-proven components for the WRX and STI platform

Specifications

• Type: TMIC Splitter (Top-Mount Intercooler Hood Scoop Airflow Divider)
• Fitment: 2006–2007 Subaru WRX (GD / EJ20) / STI (GD / EJ25)
• Intercooler Compatibility: Factory Top-Mount Intercooler (TMIC) only
• Part Number: 093077

Note: TMIC fitment only — not compatible with front-mount intercooler (FMIC) conversions. Verify your specific 2006–2007 GD WRX/STI configuration before ordering. Professional installation recommended for proper sealing and airflow management.