The COMP Cams CL31-600-9 Thumpr camshaft and lifter kit is designed for Small Block Ford performance applications that demand an aggressive exhaust note, strong midrange power, and reliable hydraulic roller operation. This kit combines a Thumpr hydraulic roller camshaft with matched lifters to provide a coordinated valvetrain solution for street and performance builds. Its sound and power characteristics make it well suited for enthusiasts seeking a noticeable performance upgrade without moving to a fully race-oriented camshaft system.
The camshaft features 0.531-inch intake lift and 0.515-inch exhaust lift, with advertised duration ratings of 283 degrees intake and 303 degrees exhaust. Duration at 0.050 inch is listed at 227 degrees on the intake and 241 degrees on the exhaust, helping deliver a strong, performance-focused power curve. The 107-degree lobe separation angle contributes to the Thumpr series’ distinctive lope and responsive throttle character. The recommended operating range is approximately 1,900 to 5,600 rpm, making this kit suitable for performance street vehicles and weekend applications with compatible supporting components.
Designed specifically for Small Block Ford engines, the COMP Cams CL31-600-9 kit offers an efficient way to upgrade the camshaft and lifter assembly together. Hydraulic roller technology helps reduce friction and supports consistent valvetrain performance while minimizing routine adjustment requirements. Proper installation should include verifying piston-to-valve clearance, valve spring compatibility, retainer clearance, pushrod length, rocker geometry, and overall valvetrain setup. The camshaft and lifters should be matched with the engine’s compression ratio, cylinder heads, intake, exhaust, gearing, and intended driving conditions for the best results. This COMP Cams Thumpr kit is a practical choice for building a responsive Small Block Ford with a pronounced performance idle and a broad, usable rpm range.
Features:
- Application: Designed for Small Block Ford engines and performance street builds
- Camshaft Type: Thumpr hydraulic roller camshaft for responsive performance and reduced friction
- Lifter Type: Matched hydraulic roller lifters included for coordinated valvetrain operation
- Advertised Duration: 283 degrees intake and 303 degrees exhaust
- Duration at 0.050 Inch: 227 degrees intake and 241 degrees exhaust
- Lobe Separation Angle: 107 degrees for an aggressive idle and performance-oriented power delivery
- Operating Range: Approximately 1,900 to 5,600 rpm
- Kit Contents: Camshaft and lifter set
