Increase your horsepower by lowering intake temperatures, with our air intake heat shield sleeve. Optimize the performance from that aftermarket air intake kit or supercharger by shielding it from radiant heat. Power is created from the dense air fuel mixture (created by the cooler intake temperatures) allowing the mixture to be burned more efficiently. CIS has an adjustable inside diameter from 3" to 4" so it will fit most air intake tubes. Manufactured with a hook and loop seam for easy access and installation. CIS will withstand 1100°F continuous radiant heat and 500°F of direct heat. Sleeve can be cut easily for custom applications and is sold with foil tape (1"w x 3') to complete installation.