GrimmSpeed StealthBox Cold Air Intake - 2015-2021 Subaru STI

This is the GrimmSpeed Stealthbox Cold Air Intake System designed to improve the performance of your vehicle. This system is a direct replacement of your factory restrictive intake and features a smooth intake tube fabricated from quality aluminum materials that limit air turbulence under boost.

GrimmSpeed StealthBox Cold Air Intake

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This is the GrimmSpeed Stealthbox Cold Air Intake System designed to improve the performance of your vehicle. This system is a direct replacement of your factory restrictive intake and features a smooth intake tube fabricated from quality aluminum materials that limit air turbulence under boost. The result is improved throttle response with more horsepower, more torque, and you get that aggressive cold air intake noise under acceleration. The intake tube also has a precision MAF fitment provision which also includes an extended MAF harness to reduce the risk of stretching your wires.

Also included in the GrimmSpeed Stealthbox is a heat shield designed to keep those hot engine temperatures away from the filter so that the filter breathes in as close to ambient temperatures as possible. Both the heatshield and the intake tube will come powder-coated a nice red finish to provide a clean look to the engine bay and to have extra protection against rust and corrosion.

The GrimmSpeed Stealthbox will also come with weather stripping, high-temp silicone hose, and hardware to make this part ready for installation.