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Comp Cams Part Number 12-412-8 is an Xtreme Energy 212/218 retro-fit hydraulic roller camshaft designed for Chevrolet Small Block 262–400 engines (1958–1998). Ideal for mild street performance applications, this camshaft offers excellent mid-range power, strong torque, smooth idle quality, and good fuel mileage. Recommended for vehicles equipped with 3.23–3.73 rear gears and supporting performance upgrades including intake, headers, and COMP roller rockers.
Xtreme Energy camshafts deliver quicker opening lobe profiles for enhanced responsiveness, increased vacuum, and improved torque—bridging the gap between Magnum street cams and race-only profiles while maintaining quiet, durable valvetrain operation.
Xtreme Energy series hydraulic roller camshaft
Mild street performance with excellent mid-range
Strong torque and smooth idle
Works best with 3.23–3.73 rear gears
Requires supporting performance components for best results
3-bolt camshaft gear attachment
| Specification | Value |
|---|---|
| Camshaft Type | Hydraulic Roller |
| Series | Xtreme Energy |
| Engine Family | Chevrolet 262–400 c.i. (1958–1998) |
| RPM Range | 1,200–5,200 |
| Advertised Duration (Int/Exh) | 264 / 270 |
| Duration @ .050" (Int/Exh) | 212 / 218 |
| Valve Lift (Int/Exh) | 0.487 / 0.495 |
| Lobe Separation Angle | 110° |
| Intake Open (BTDC) | 26° |
| Intake Close (ABDC) | 58° |
| Exhaust Open (BBDC) | 69° |
| Exhaust Close (ATDC) | 21° |
| Valve Timing @ .006" | Not specified |
| Gear Attachment | 3-Bolt |
| Usage | Street/Performance |
| Lifter Type | Hydraulic Roller |
| Warranty | 12 Months |
| UPC | 036584025139 |
| Emissions Code | Not specified |
| California Proposition 65 | Cancer and Reproductive Harm (P65Warnings.ca.gov) |
Make: Chevrolet
Engine Family: 262–400 c.i. Small Block V8
Model Years: 1958–1998
Cam Gear Style: 3-bolt
