The Brian Tooley Racing Truck Norris Camshaft Kit is engineered for GM 6.0L and 6.2L rectangle-port LS truck engines that demand stronger low- and mid-range response with a distinct performance character. Designed around BTR's proven lobe technology, the Truck Norris cam delivers improved throttle response, enhanced cylinder filling, and a noticeable performance sound while remaining suitable for properly supported street-driven trucks and SUVs. This camshaft is commonly selected for rectangle-port LS applications where a balance of drivability and performance is desired when paired with appropriate valvetrain components and calibration.