What vehicles does this COMP Cams camshaft fit?

This camshaft is designed for Chevrolet Gen 1 Small Block engines found in a wide range of vehicles from AM General, Avanti, Buick, Cadillac, Checker, Chevrolet, and GMC. It's important to confirm your specific engine is a flat tappet design and not a factory roller camshaft.

Does this camshaft include the oiling groove for 1955-1957 Chevrolet engines?

No, this specific camshaft (part number 12-681-5) does not include the oiling groove required for 1955-1957 Chevrolet 265 engines. If your engine requires this groove, you will need to contact COMP Cams directly for assistance.

What is the lift and duration of this camshaft?

This COMP Cams CS 273L283 S7 camshaft features a lobe lift of .283 inches and a duration of 246 degrees intake and 250 degrees exhaust at .050 inch lift.

COMP Cams CS 273L283 S7 Solid Flat Camshaft 12-681-5

Name: COMP Cams Camshaft CS 273L283 S7
Brand: COMP Cams
SKU: comp-cams-comp-cams-camshaft-cs-273l283-s7-t14-4390370
Price: 378.83 USD
Availability: BackOrder

COMP Cams Camshaft CS 273L283 S7

$378.83

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 CS 273L283 S7 solid flat camshaft. Designed for higher RPM performance in Chevrolet Small Block Gen 1 engines.

Key Features

Fits Chevrolet Gen 1 Small Blocks and many compatible GM vehicles.
Solid flat tappet design for performance applications.
Features .283" lobe lift, suitable for higher RPM operation.
Offers 246/250 degrees duration at .050" lift.
Part number 12-681-5 from COMP Cams.

⚠️ 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

Secure CheckoutFast Shipping631-982-0042

Will this fit your vehicle?

Product Details

This COMP Cams CS 273L283 S7 camshaft is a solid flat tappet design, built for performance in a wide range of Chevrolet Small Block Gen 1 engines. It features a lobe lift of .283 inches, making it a good choice for builds aiming for higher RPM operation, especially where lift restrictions might apply. This camshaft is designed to fit many Chevrolet, Buick, Cadillac, and GMC vehicles from the early 80s through the mid-90s, including popular models like the Chevrolet Camaro, Corvette, and C1500 trucks.

The Launcher Series camshaft offers a 246/250 degree duration at .050 inch lift, providing a noticeable performance bump over stock. Its .283 inch lobe lift is specifically chosen to work well within certain lift rules often found in racing or performance applications. When installing this camshaft, it's important to confirm your engine uses a flat tappet design, as some later models from 1985 onward incorporated factory roller camshafts. Additionally, 1955-1957 Chevrolet 265 engines require a specific oiling groove on the rear journal, which this particular camshaft does not have.