BTR Truck Norris Cam, Springs and Hats 12613412 but we decided to upgrade

but we decided to upgrade them to a pressed inner race comprised of 52100 heat treated bearing steel

The reverse flow and pressure creates havoc with the turbo or blower by attempting to stop or even reverse the compressor wheel (not desirable at 50

660" LIFT - SK001

BTR CAMSHAFT - GEN V 5

BTR Truck Norris Cam, Springs and Hats 12613412 but we decided to upgradeBTR GEN III & IV LS TRUCK NORRIS CAM Specs: 212 22X, . 552 . 552, 107 LSA INTAKE LOBE LIFT @ TDC: 0. 05271 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.