GrimmSpeed intercoolers have long set the standard for high-performance heat exchangers—delivering the ideal balance of low pressure drop, high heat rejection, and bulletproof reliability. With years of engineering experience behind us, we’re proud to introduce the intercooler STI owners have been waiting for: the GrimmSpeed 2015–21 STI Front Mount Intercooler Kit.
Quick Specs
27” x 11” x 4” Cross-Flow Core – Bar-and-plate construction optimized for cooling efficiency and minimal restriction
Cast Aluminum End Tanks – Balanced, equalized flow with virtually no added pressure drop
Steel Bolt-On Mounting Brackets – Rigid, adjustable, and designed to stay put even under hard track use
Minimal Vehicle Modification Required – Only two small undertray ribs and simple splash-guard trimming necessary
Intake Compatible – Works with factory intake or GrimmSpeed Intake (snorkel removal required)
Pressure Tested In-House – Cleaned, sealed, and verified for flawless performance
Raw Aluminum or Satin Black Powdercoat – Choose uncoated for maximum heat dissipation or powdercoat for added protection
Pre-Applied GrimmSpeed Vinyl Decal – Display it proudly or peel it off—your choice
No Tune Required – Maintains factory boost behavior and spool characteristics
Hand-Welded & Inspected in the USA – Built for consistency, durability, and top-tier performance
Intercooler Core
The foundation of any great FMIC is its core—and this one is engineered from the ground up for unmatched performance. Using over a decade of intercooler development, GrimmSpeed created a fully custom cross-flow core with internal and external fin specs tuned for:
Extremely low pressure drop
Superior heat rejection
Consistent performance under everyday and high-demand conditions
The cast end tanks were co-developed with the core to deliver smooth, even airflow across all cylinders. Every unit is designed, welded, pressure-tested, and inspected in the USA to ensure flawless operation.
Fitment was equally important. This kit retains a massive intercooler core without cutting the bumper cover, trimming light housings, or relocating components like the washer tank or coolant reservoir—common issues with other FMIC kits.
Intercooler Piping
A great core demands properly engineered piping. GrimmSpeed’s piping kit features:
.090”-wall, 2.5” ID 6061 aluminum—strong, lightweight, and heat-dissipating
Precision routing that avoids unnecessary trimming and retains OEM components
Maintains factory fog light mounting
Custom-molded 5-ply silicone couplers
Stainless Breeze Hi-Torque liner clamps to protect silicone and prevent leaks
Wrinkle powdercoat finish
OEM bypass valve placement retained for OE or most aftermarket BPV compatibility
The install was very easy and i didnt have to trim anything
Joshua,
Thank you for the 5 Star Review and added pic! The Grimmspeed Front Mount Intercooler Kit is HUGE! This kit is designed to be as large as possible without having to trim anything. The large core is designed to deliver the best cooling option on the market. Grimmspeed really did it right with this kit!
