Max Cooling Bundle for 2008-2021 Subaru STI by GrimmSpeed
The 2015–2021 WRX STI is one of the most capable Subarus ever built, but the stock cooling setup leaves plenty of room for improvement. That’s why we put together the GrimmSpeed Max Cooling Bundle — pairing Grimmspeed Top Mount Intercooler Kit with the CSF 31mm High-Performance Radiator, designed to keep your EJ25 running stronger, longer, and cooler under pressure.
This combo eliminates two major factory weak points, delivering reliable performance whether you’re canyon carving, daily driving, or chasing numbers at the track. It's designed to keep your STI cool and consistent, no matter how hard you drive. The GrimmSpeed TMIC drastically reduces intake temps, while CSF’s 31mm all-aluminum radiator boosts coolant efficiency with track-tested durability. It's a must-have pairing for drivers who demand more.
Features
- 1-row, 31mm core featuring CSF’s B-Tube Technology
- Cast aluminum end tank Intercooler with integrated BPV flange
- Full TIG-welded construction Radiator with deep-drawn aluminum end tanks
Benefits
- Compatible with factory and most aftermarket charge pipes
- No trimming or mods required
- Direct bolt-on install using factory locations
