This is Brian Tooley Racing's Truck Norris camshaft for naturally aspirated applications. It is a hydraulic roller, 3-bolt camshaft for Gen III and Gen IV LS truck engines.
Specs: 212/22X, .552/.552, 107 LSA
The Truck Norris will deliver a roundhouse kick in the pants to your 1999-2013 Silverado or Sierra. Developed from hundreds of hours of in house cam lobe design and dyno testing, this camshaft has more power and torque everywhere in the curve compared to our legendary V2 truck cams.