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Comp Cams Part Number 11-214-4 is a Magnum 253/253 hydraulic flat tappet camshaft engineered for Chevrolet Big Block 396–454 engines (1967–1996). Designed for limited street use and bracket racing, this camshaft requires 10.5:1 compression, a 3500+ stall converter or 4-speed, and 4.10+ rear gearing. Delivers a radical, aggressive idle and strong upper-RPM performance for street/strip builds.
Magnum series hydraulic flat tappet camshaft
Suitable for bracket racing or limited street use
Radical idle quality
Requires high compression and aggressive driveline setup
Strong upper-RPM performance
3-bolt camshaft gear attachment
| Specification | Value |
|---|---|
| Camshaft Type | Hydraulic Flat Tappet |
| Series | Magnum |
| Engine Family | Chevrolet 396–454 c.i. (1967–1996) |
| RPM Range | 3,000–6,800 |
| Advertised Duration (Int/Exh) | 305 / 305 |
| Duration @ .050" (Int/Exh) | 253 / 253 |
| Valve Lift (Int/Exh) | 0.575 / 0.575 |
| Lobe Lift (Int/Exh) | 0.339 / 0.339 |
| Lobe Separation Angle | 110° |
| Intake Centerline | 110° |
| Intake Open (BTDC) | 43° |
| Intake Close (ABDC) | 83° |
| Exhaust Open (BBDC) | 83° |
| Exhaust Close (ATDC) | 43° |
| Valve Timing @ .006" | Not specified |
| Gear Attachment | 3-Bolt |
| Usage | Street/Strip |
| Lifter Type | Hydraulic Flat Tappet |
| Warranty | 12 Months |
| UPC | 036584520023 |
| Emissions Code | Not specified |
| California Proposition 65 | Cancer and Reproductive Harm (P65Warnings.ca.gov) |
Make: Chevrolet
Engine Family: 396–454 c.i. Big Block V8
Model Years: 1967–1996
Cam Gear Style: 3-bolt
