The HARD Motorsport E46 M3 Brake Duct Inlets are formed out of ABS plastic for light weight and durablitly. These Brake Ducts Inlets are made to fit the E46 M3 front bumper and allow you to run a 3" flex hose to your brakes for cooling during track conditions. The E46 M3 Brake Duct Inlets are commonly used as E46 M3 Foglight Deletes. These also fit ZHP / Mtech2 bumpers. These are sold as a pair. Mounting rivets included in the kit.