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Add a consistent 10+ wheel horsepower with the largest Top Mounted Intercooler on the market! Perrin Performance pushed every dimension to make this the best TMIC for your STI! The Perrin Performance Intercooler Core is 75% larger than the stock intercooler, featuring a higher flow design and more consistent horsepower gain when compared to other cores. The larger core means less restriction and better cooling capabilities for more horsepower. Rated well over 600 WHP, the Perrin Performance cores extra-large cross-section and cooler charge temps will add an easy 10 WHP and keep up with all performance upgrades.