Thumpr NSR Camshaft 09- Up Dodge 5.7/6.4L HEMI

The COMP CAMS Thumpr NSR Camshaft for 2009-and-up Dodge 5.7L and 6.4L HEMI engines is a high-lift hydraulic roller camshaft engineered for elevated performance without requiring extensive head porting or valve train modification. This camshaft delivers 0.510-inch intake lift and 0.505-inch exhaust lift across a 268-degree intake and 295-degree exhaust duration window, producing noticeable power gains across the 1800–6500 RPM operating range while maintaining compatibility with stock valve springs and lifter architecture.

The 113-degree lobe separation angle (LSA) balances streetable idle characteristics with strong mid-range torque production typical of modern Mopar Gen III HEMI applications. Hydraulic roller design minimizes friction and valve train noise compared to mechanical lifter designs, while the asymmetric lobe profile—with more aggressive exhaust duration than intake—optimizes cylinder scavenging during overlap events. This combination is ideal for 5.7L and 6.4L HEMI owners seeking measurable horsepower and torque increases without a complete engine rebuild or custom machining of cylinder head ports.

Builders and enthusiasts upgrading Dodge trucks, SUVs, and performance vehicles with Gen III HEMI powerplants rely on this camshaft as a bolt-on foundation for bolt-on intake and exhaust system upgrades. The elevated lift and extended duration command fuel system adjustments and tuning optimization to achieve stable idle quality and drivability. Verification of rocker arm geometry and pushrods is essential before installation to confirm adequate valve stem clearance at maximum lift—standard practice for any HEMI cam upgrade beyond stock specifications.