BTR HOT ROD CAMSHAFT 217/23X, .619/.607, 114 LSA INTAKE LOBE LIFT @ TDC: 0.03980 BTR's Hot Rod cam delivers an aggresive idle while maintaining good street manners. It makes slightly less torque down low than our Truck Norris cam yet produces an additional 20+ HP at peak. These newly designed BTR lobes were developed in house and tested on our Spintron and Engine Dyno to achieve the highest overall power curve while also maintaining our strict valvetrain stability and durability standards. Testing was done with E85 fuel. Aftermarket torque converter recommended.