COBB Alternator Pulley and Radiator Shroud Kits are made from 5052-H32 aluminum and finished in wrinkle black both for protection and a nice accent flair, and feature a laser-etched COBB logo as well. Cutouts in the shroud also provides additional cooling for the radiator. Mounting holes are slotted for adjustment on the fitment. This kit is the perfect way to spruce up the engine bay and help with cooling on your Subaru WRX STI's radiator!