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Comp Cams Part Number 08-601-8 is a Mutha' Thumpr 235/249 hydraulic roller camshaft designed for Chevrolet 305–350 O.E. Roller engines (1987–1998). Known for its aggressive, choppy idle and strong midrange power, this camshaft is ideal for street/strip performance builds seeking both sound and performance. Operates effectively in the 1,900–5,600 RPM range and uses a 3-bolt cam gear.
Mutha' Thumpr series hydraulic roller camshaft
Signature aggressive Thumpr idle
Strong midrange power for street/strip performance
Designed for 1987–1998 O.E. roller small block Chevy engines
3-bolt camshaft gear attachment
Excellent airflow characteristics with wide powerband
| Specification | Value |
|---|---|
| Camshaft Type | Hydraulic Roller |
| Series | Thumpr |
| Engine Family | Chevrolet 305–350 O.E. Roller (1987–1998) |
| RPM Range | 1,900–5,600 |
| Advertised Duration (Int/Exh) | 291 / 311 |
| Duration @ .050" (Int/Exh) | 235 / 249 |
| Valve Lift (Int/Exh) | 0.522 / 0.509 |
| Lobe Separation Angle | 107° |
| Intake Centerline | 102° |
| Intake Open (BTDC) | 42° |
| Intake Close (ABDC) | 69° |
| Exhaust Open (BBDC) | 82° |
| Exhaust Close (ATDC) | 49° |
| Valve Timing @ .006" | Not specified |
| Gear Attachment | 3-Bolt |
| Usage | Street/Strip |
| Lifter Type | Hydraulic Roller |
| Warranty | 12 Months |
| UPC | 036584171980 |
| Emissions Code | Not specified |
| Make | Chevrolet |
| California Proposition 65 | Cancer and Reproductive Harm (P65Warnings.ca.gov) |
Make: Chevrolet
Engine Family: 305 / 350 O.E. Roller small block V8
Model Years: 1987–1998
Cam Gear Style: 3-bolt
