What type of distributor gear is required for this camshaft?

This COMP Cams camshaft is optimized for use with a Melanized or Nitrided distributor gear. Using standard cast iron or steel gears without similar surface treatments is not recommended and will void all warranties.

Will this camshaft fit all Chevrolet Big Block 396 engines?

This camshaft is not compatible with 1965-1966 396 Big Block models that have an oiling groove in the rear journal. For those specific engines, you will need to contact COMP Cams for an alternative part number.

Can this camshaft be shipped to California?

No, this camshaft is not CARB approved and cannot be shipped to California due to emissions regulations.

COMP Cams Solid Roller Camshaft CB 313Gr-10 11-734-9

Name: COMP Cams Camshaft CB 313Gr-10
Brand: COMP Cams
Price: 604.45 USD
Availability: InStock

COMP Cams Camshaft CB 313Gr-10

$604.45

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

COMP Cams CB 313Gr-10 solid roller camshaft for BBC 396-454 engines. Optimized for Melanized/Nitrided distributor gears.

Key Features

Fits Chevrolet Big Block 396-454 engines originally equipped with flat tappet camshafts.
Solid roller camshaft with 276° intake and 284° exhaust duration at 0.050" lift.
Features 0.624" intake and 0.632" exhaust lift.
Optimized for Super Street/Super Gas applications with 427-468 c.i.d. engines.
Requires a 5000+ RPM stall speed and 12:1+ compression ratio for best performance.
Must be used with a Melanized or Nitrided distributor gear to avoid warranty issues.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Will this fit your vehicle?

Product Details

This COMP Cams CB 313Gr-10 solid roller camshaft is designed for Chevrolet Big Block engines, specifically the 396 to 454 cubic inch displacements. It's built for performance applications like Super Street and Super Gas, and works best with engines around 427-468 cubic inches that have a compression ratio of 12:1 or higher and a stall speed of 5000 RPM or more. This camshaft is a direct replacement for engines originally equipped with flat tappet camshafts, fitting a wide range of Chevrolet vehicles from the late 1960s through the mid-1990s, including models like the Chevrolet Impala, Camaro, and C10 Pickup.

The CB 313Gr-10 features a 276-degree intake duration and 284-degree exhaust duration at 0.050 inch lift, with a 0.624 inch intake lift and 0.632 inch exhaust lift. It's a solid roller design, which generally allows for higher RPMs and more aggressive valve events compared to flat tappet cams. For proper operation and to maintain warranty, this camshaft must be used with a Melanized or Nitrided distributor gear. Using cast iron or steel gears without these surface treatments can lead to premature wear and will void the warranty.

When installing this camshaft, it's important to note that some 1965-1966 396 Big Block engines have an oiling groove in the rear journal that this specific camshaft is not designed for. If your engine has this feature, you'll need to contact COMP Cams directly for a different part number. Also, this camshaft is not CARB approved and cannot be shipped to California.