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Comp Cams Part Number 54-602-11 is a Big Mutha' Thumpr hydraulic roller camshaft designed for GM LS Gen III/IV 8-cylinder engines (1997–2015) with a 3-bolt cam gear setup. Built for street/strip performance, this camshaft delivers the signature Thumpr aggressive idle while supporting strong mid-to-high RPM power.
Big Mutha' Thumpr series for an aggressive idle and strong street/strip performance
Hydraulic roller design
3-bolt cam gear attachment
Designed for GM LS Gen III/IV applications (1997–2015)
Optimized for 2,600–6,800 RPM operating range
Works with hydraulic roller lifters
| Specification | Value |
|---|---|
| Camshaft Type | Hydraulic Roller |
| Series | Thumpr |
| Engine Family | GM LS Gen III/IV 8-Cylinder (1997–2015) |
| RPM Range | 2,600–6,800 |
| Advertised Duration (Int/Exh) | 291 / 311 |
| Duration @ .050" (Int/Exh) | 235 / 249 |
| Valve Lift (Int/Exh) | 0.573 / 0.558 |
| Lobe Lift (Int/Exh) | 0.338 / 0.329 |
| Lobe Separation Angle | 109° |
| Intake Centerline | 103° |
| Valve Timing @ .006" | Not specified |
| Intake Open (BTDC) | 41° |
| Intake Close (ABDC) | 70° |
| Exhaust Open (BBDC) | 85° |
| Exhaust Close (ATDC) | 46° |
| Gear Attachment | 3-Bolt |
| Lifter Type | Hydraulic Roller |
| Usage | Street/Strip |
| Warranty | 12 Months |
| UPC | 036584195184 |
| Emissions Code | Not specified |
| California Proposition 65 | Cancer and Reproductive Harm (P65Warnings.ca.gov) |
Make: GM
Engine Family: LS Gen III/IV 8-cylinder
Model Years: 1997–2015
Cam Gear Style: 3-bolt only
