Maximize airflow and safeguard your valvetrain with the Colt Cams Street/Strip Camshaft (Part # C-1014-S). Precision-engineered for 2001–2010 GM 6.6L Duramax turbo diesels (LB7, LLY, LBZ, and LMM), this brand-new billet camshaft delivers the ideal balance of everyday street manners, broad mid-range torque, and aggressive top-end pulling power.

Factory Duramax camshaft profiles compromise cylinder filling and trap exhaust heat in the name of base emissions calibration. The Colt Cams Street/Strip grind features an optimized lift and duration curve that increases volumetric efficiency, lowers Exhaust Gas Temperatures (EGTs), and provides significantly crisper throttle response off the line. Machined with a critical pre-cut keyway, this camshaft also eliminates one of the most notorious factory Duramax failure points: dowel pin shearing under high horsepower or rapid RPM transitions.

Key Performance Benefits

• 100% New Billet Steel Construction: Machined from virgin steel billet stock—never a welded or reground core. No core charge, no core return hassle.

• Pre-Machined Keyway & Key Included: Solves the infamous factory Duramax cam gear slip issue. Comes pre-cut with a precision keyway and includes a hardened key for positive mechanical locking.

• Drop-In Compatibility: Engineered as a direct drop-in replacement that clears factory piston valve reliefs on standard-deck builds without requiring valve pocket machining.

• Lower EGTs & Quicker Spool: Promotes aggressive exhaust gas scavenging, letting single and compound turbos light faster while venting destructive cylinder heat.

• Extended Usable RPM: Eliminates high-RPM choking and carries pulling torque deep into the upper rev range—making it equally at home on the highway, sled pull track, or drag strip.

• Clean Street Manners: Delivers a crisp, authoritative idle and instant boost ramp without sacrificing daily towing drivability.

Camshaft Specifications

Vehicle Fitment

Direct fit for 2001–2010 Chevrolet Silverado and GMC Sierra 2500HD/3500HD trucks, Kodiak/TopKick chassis cabs, and Duramax-swapped applications:

• 2001–2004 GM 6.6L Duramax LB7 (8th digit of VIN = 1)

• 2004.5–2005 GM 6.6L Duramax LLY (8th digit of VIN = 2)

• 2006–2007 GM 6.6L Duramax LBZ (8th digit of VIN = D)

• 2007.5–2010 GM 6.6L Duramax LMM (8th digit of VIN = 6)

⚠️ Engine Builder Notes & Recommended Valvetrain Upgrades

• Keyed Crankshaft & Cam Gear: Because this camshaft is pre-keyed for maximum shear protection, we strongly recommend pairing it with a pinned/keyed crankshaft and a keyed cam drive gear to ensure rock-solid timing synchronization under high boost.

• Fresh Cam Bearings: Always install a new set of camshaft bearings during assembly. We recommend the Clevite Duramax Cam Bearing Set (cleSH1999S).

• Upgraded Valve Springs & Pushrods: While this profile works with factory-spec valvetrains, trucks running elevated boost levels, larger aftermarket turbos, or sustained high RPM will benefit from upgraded conical valve springs and heavy-duty pushrods to eliminate high-RPM valve float.