Larger version of No Springs Required (NSR) Thumpr design for 5.3 & 6.0L truck applications. Ideal for more highly modified truck w/ headers, converter, gear, etc. For Stage 2 Thumpr Cam for GEN III LS 4.8/5.3/6.0L Trucks. Camshaft Series: Thumpr NSR (No Springs Required) Cam Type: Hydraulic Roller. Basic Operating RPM Range: 1,800-6,600. Intake Duration at .050 Inch Lift: 226. Exhaust Duration at .050 inch Lift: 237. Advertised Intake Duration: 280. Advertised Exhaust Duration: 299. Lobe Separation: 113. Intake Valve Lift: 0.663. Exhaust Valve Lift: 0.638. Lifters Included: No. Valve Springs Required: No. Assembly Lubricant Included: No. Camshaft Gear Attachment: 3-Bolt. Camshaft Material: Billet Steel.
