268THR12 Thumpr NSR Camshaft Dodge Chrysler 300 SRT Non-VVT 5.7/6.1L GEN 3 HEMI 2003-2008 Choppy Thumping Idle

Comp Cams Thumpr, Dodge Gen 3 Hemi 5.7L, 6.1L Camshaft, 2003-2008 Chrysler 300 SRT,

- Requires disabling of the MDS system and use of Non-MDS lifters

- Requires Custom Tuning

The Thumpr NSR 214/233 Hydraulic Roller Camshaft for Dodge Chrysler 5.7L & 6.1L HEMI 2003-08 delivers the awesome Thumpr™ sound from your HEMI with a simple camshaft swap change & tune. Excellent performance in the mid to upper RPM with only small losses below 2500 RPM.

Delivers the awesome Thumpr sound from your HEMI with a simple camshaft change & tune. Excellent performance in the mid to upper RPM with only small losses below 2500 RPM.

COMP Cams is bringing the Thumpr camshaft series to the 2003-2008 Dodge 5.7/6.1L and 2009+ Dodge 5.7/6.4L HEMI engines. The new COMP Cams Thumpr NSR camshafts offer big power gains along with the unmistakable Thumpr idle lope, all without the need to upgrade valve springs.In the past, attaining a racecar idle sound meant swapping to a camshaft that sacrificed low-RPM torque. COMP Cams engineers have overcome this dilemma by delivering Thumpr camshaft technology to the modern Dodge HEMI engine platform. Thanks to optimized intake and exhaust lobes, the Thumpr, GEN III/IV HEMI enthusiasts can have a lopey idle without sacrificing the low RPM torque that street-driven HEMIs require.The Thumpr NSR camshafts for the Dodge GEN III/IV HEMI do not require a valve spring upgrade, while COMP Cams does recommend both an ECU tune and DOD deletion, as well as a phaser limiter for VVT-equipped GEN IV HEMI engines.

Engine Family:  Dodge 5.7L and 6.1L HEMI (2003+)

RPM Operating Range:  1,600-6,200

Grind Number:  268THR12

Cam Type:  Hydraulic Roller

Lifter Style:  Hydraulic Roller

Camshaft Series:  Thumpr

Usage:  Street / Performance

Advertised Intake Duration:  268

Advertised Exhaust Duration:  295

Intake Duration at .050 Inch Lift:  214

Exhaust Duration at .050 Inch Lift:  233

Intake Valve Lift:  0.495

Exhaust Valve Lift:  0.492

Lobe Separation:  112

Camshaft Gear Attachment:  1-Bolt