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Thumbnail Filmstrip of 5.9 / 6.7 Cummins Stage 3 Big Stick Camshaft Colt Cams - C-343-S-S3 Images
Take your Cummins build to the next level with legendary airflow dynamics and proven street-to-strip reliability. The Colt Cams Stage 3 "Big Stick" (Part # C-343-S-S3) is widely recognized as one of the most effective all-around camshaft upgrades ever developed for 12-valve, 24-valve, and Common Rail 5.9L and 6.7L Cummins turbo diesels.
Factory Cummins camshaft profiles are engineered around strict factory emissions compromises, restricting scavenging and trapping combustion heat in the cylinders. The Big Stick profile alters valve events to evacuate exhaust gas rapidly while pulling in maximum clean boost air. The result? A massive drop in exhaust gas temperatures, significantly reduced exhaust smoke, faster spool-up, and real-world fuel economy gains—paired with a confident, aggressive performance idle.
Key Performance Benefits
Up to 200°F EGT Reduction: Rapid exhaust evacuation removes built-up thermal stress from cylinders, safeguarding pistons, valves, and turbochargers under heavy towing and high-load pulls.
30% to 35% Smoke Reduction: By delivering more fresh air earlier in the compression cycle, unburned fuel haze is drastically curtailed across the RPM band.
2 to 3 MPG Efficiency Gains: Improved cylinder volumetric efficiency means the engine uses less fuel to sustain cruising speeds under load.
Fast-Spooling Low-End Torque: Keeps boost responsive off the line and throughout the mid-range—ideal for daily drivers, work trucks, and performance street builds.
Distinct Diesel Idle: Provides a deep, authoritative idle lope without sacrificing street drivability or cold-start manners.
Camshaft Specifications
| Specification | Intake | Exhaust |
| Duration @ .050" | 181° | 210° |
| Cam Lift | 0.280" | 0.307" |
| Lobe Profile | Stage 3 "Big Stick" | Stage 3 "Big Stick" |
| Platform Compatibility | 12V, 24V, & Common Rail | 12V, 24V, & Common Rail |
| Warranty | 1-Year Limited Structural | 1-Year Limited Structural |
Vehicle Fitment
Direct-fit valvetrain upgrade for the following Dodge Ram / Ram 2500, 3500, 4500, and 5500 trucks and Cummins industrial applications:
1989–1993 5.9L 12-Valve Cummins (1st Gen)
1994–1998 5.9L 12-Valve Cummins (2nd Gen)
1998.5–2002 5.9L 24-Valve Cummins (ISB VP44)
2003–2007 5.9L 24-Valve Common Rail Cummins (5.9 CR)
2007.5–2018+ 6.7L 24-Valve Common Rail Cummins (6.7 CR)
Critical Installation & Warranty Information
Tappet Replacement Required for Warranty: Colt Cams requires the installation of a brand-new set of tappets/lifters alongside this camshaft to validate their 1-year limited structural warranty. Installing a new camshaft on old or worn lifters can cause premature lobe failure.
Recommended Hardware: We strongly advise installing a new Colt Cams Cam Gear Retainer and fresh cam bearings during assembly to ensure valvetrain alignment and long-term durability.
Take your Cummins build to the next level with legendary airflow dynamics and proven street-to-strip reliability. The Colt Cams Stage 3 "Big Stick" (Part # C-343-S-S3) is widely recognized as one of the most effective all-around camshaft upgrades ever developed for 12-valve, 24-valve, and Common Rail 5.9L and 6.7L Cummins turbo diesels.
Factory Cummins camshaft profiles are engineered around strict factory emissions compromises, restricting scavenging and trapping combustion heat in the cylinders. The Big Stick profile alters valve events to evacuate exhaust gas rapidly while pulling in maximum clean boost air. The result? A massive drop in exhaust gas temperatures, significantly reduced exhaust smoke, faster spool-up, and real-world fuel economy gains—paired with a confident, aggressive performance idle.
Key Performance Benefits
Up to 200°F EGT Reduction: Rapid exhaust evacuation removes built-up thermal stress from cylinders, safeguarding pistons, valves, and turbochargers under heavy towing and high-load pulls.
30% to 35% Smoke Reduction: By delivering more fresh air earlier in the compression cycle, unburned fuel haze is drastically curtailed across the RPM b[...]
Take your Cummins build to the next level with legendary airflow dynamics and proven street-to-strip reliability. The Colt Cams Stage 3 "Big Stick" (Part # C-343-S-S3) is widely recognized as one of the most effective all-around camshaft upgrades ever developed for 12-valve, 24-valve, and Common Rail 5.9L and 6.7L Cummins turbo diesels.
Factory Cummins camshaft profiles are engineered around strict factory emissions compromises, restricting scavenging and trapping combustion heat in the cylinders. The Big Stick profile alters valve events to evacuate exhaust gas rapidly while pulling in maximum clean boost air. The result? A massive drop in exhaust gas temperatures, significantly reduced exhaust smoke, faster spool-up, and real-world fuel economy gains—paired with a confident, aggressive performance idle.
Key Performance Benefits
Up to 200°F EGT Reduction: Rapid exhaust evacuation removes built-up thermal stress from cylinders, safeguarding pistons, valves, and turbochargers under heavy towing and high-load pulls.
30% to 35% Smoke Reduction: By delivering more fresh air earlier in the compression cycle, unburned fuel haze is drastically curtailed across the RPM band.
2 to 3 MPG Efficiency Gains: Improved cylinder volumetric efficiency means the engine uses less fuel to sustain cruising speeds under load.
Fast-Spooling Low-End Torque: Keeps boost responsive off the line and throughout the mid-range—ideal for daily drivers, work trucks, and performance street builds.
Distinct Diesel Idle: Provides a deep, authoritative idle lope without sacrificing street drivability or cold-start manners.
Camshaft Specifications
| Specification | Intake | Exhaust |
| Duration @ .050" | 181° | 210° |
| Cam Lift | 0.280" | 0.307" |
| Lobe Profile | Stage 3 "Big Stick" | Stage 3 "Big Stick" |
| Platform Compatibility | 12V, 24V, & Common Rail | 12V, 24V, & Common Rail |
| Warranty | 1-Year Limited Structural | 1-Year Limited Structural |
Vehicle Fitment
Direct-fit valvetrain upgrade for the following Dodge Ram / Ram 2500, 3500, 4500, and 5500 trucks and Cummins industrial applications:
1989–1993 5.9L 12-Valve Cummins (1st Gen)
1994–1998 5.9L 12-Valve Cummins (2nd Gen)
1998.5–2002 5.9L 24-Valve Cummins (ISB VP44)
2003–2007 5.9L 24-Valve Common Rail Cummins (5.9 CR)
2007.5–2018+ 6.7L 24-Valve Common Rail Cummins (6.7 CR)
Critical Installation & Warranty Information
Tappet Replacement Required for Warranty: Colt Cams requires the installation of a brand-new set of tappets/lifters alongside this camshaft to validate their 1-year limited structural warranty. Installing a new camshaft on old or worn lifters can cause premature lobe failure.
Recommended Hardware: We strongly advise installing a new Colt Cams Cam Gear Retainer and fresh cam bearings during assembly to ensure valvetrain alignment and long-term durability.
Fits: 5.9|6.7 Cummins 1989-2017