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Comp Cams Part Number 11-773-8 is an Xtreme Energy 254/260 solid roller camshaft designed for Chevrolet 396–454 big block engines (1967–1996). Built for serious Pro Street applications, this cam delivers aggressive midrange-to-high-RPM performance. It requires supporting modifications including 11:1+ compression, a 3500+ stall converter, strong intake and exhaust systems, and proper gearing to achieve its full potential.
High-performance Xtreme Energy solid roller camshaft
Ideal for Pro Street BBC builds requiring aggressive top-end power
Strong midrange and upper-RPM output
Requires high compression and significant supporting mods
3,200–7,200 RPM operating range
3-bolt camshaft gear attachment
| Specification | Value |
|---|---|
| Camshaft Type | Solid Roller |
| Series | Xtreme Energy |
| Engine Family | Chevrolet 396–454 (1967–1996) |
| RPM Range | 3,200–7,200 |
| Advertised Duration (Int/Exh) | 292 / 298 |
| Duration @ .050" (Int/Exh) | 254 / 260 |
| Valve Lift (Int/Exh) | 0.660 / 0.666 |
| Lobe Separation Angle | 110° |
| Intake Centerline | 106° |
| Intake Open (BTDC) | 40° |
| Intake Close (ABDC) | 72° |
| Exhaust Open (BBDC) | 83° |
| Exhaust Close (ATDC) | 35° |
| Valve Timing @ .015" | Provided (0.015" lift reference) |
| Gear Attachment | 3-Bolt |
| Usage | Street/Performance |
| Lifter Type | Solid Roller |
| Warranty | 12 Months |
| UPC | 036584062974 |
| Emissions Code | Not specified |
| Make | Chevrolet |
| California Proposition 65 | Cancer & Reproductive Harm (P65Warnings.ca.gov) |
Make: Chevrolet
Engine Family: Big Block 396 / 402 / 427 / 454
Model Years: 1967–1996
Recommended Setup:
11:1+ compression
3500+ stall converter
Performance intake and exhaust
Proper gearing for high-RPM operation
