Does this camshaft fit my 1986 Chevrolet 305 engine?

This camshaft is designed for Chevrolet GEN 1 Small Blocks. However, many engines from 1985 and newer were gradually equipped with factory roller camshafts. You will need to confirm if your specific 1986 305 has a flat tappet or roller camshaft by removing the intake or timing cover.

What is the lift and duration of this camshaft?

This camshaft features a Max Area 236/240 duration. It is designed to work well with .500 lift rules when paired with 1.5 ratio rocker arms.

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 Flat Camshaft CS 263Ma-S6 | 12-620-5

Name: COMP Cams Camshaft CS 263Ma-S6
Brand: COMP Cams
Price: 378.83 USD
Availability: InStock

COMP Cams Camshaft CS 263Ma-S6

$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 is known for performance engine components. This CS 263Ma-S6 camshaft offers a Max Area 236/240 duration for Chevrolet Small Blocks.

Key Features

Fits Chevrolet GEN 1 Small Blocks including 262, 265, 267, 283, 302, 305, 307, 327, 350 and 400 cubic inch engines.
Features a Max Area 236/240 duration profile for improved performance.
Designed for use with iron intake manifolds and heads.
Works well with 1.7 ratio or higher rocker arms.
Suitable for 1/4 to 3/8 mile dirt racing applications.
Complies with .500 lift rules when used with 1.5 ratio rockers.

⚠️ 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

COMP Cams is a well-known name in performance engine parts, and this CS 263Ma-S6 camshaft is built for Chevrolet Small Block engines. Designed for applications like the 327-350 cubic inch engines with iron intake and heads, this camshaft offers a Max Area 236/240 duration, making it a solid option for 1/4 to 3/8 mile dirt racing or for builds adhering to a .500 lift rule with 1.5 ratio rockers.

This camshaft is a flat tappet design, and it's important to confirm your engine's configuration. While many engines from the mid-80s onward transitioned to roller camshafts, many trucks and SUVs continued to use flat tappet cams well into the 90s. You'll need to remove the intake or timing cover to verify if your block is factory roller or flat tappet. Also, note that 1955-1957 Chevrolet 265 engines require a specific oiling groove on the rear journal, which this particular camshaft does not have; please contact us if you need that specific application.

This camshaft fits a wide range of Chevrolet GEN 1 Small Blocks, including popular displacements like the 327, 350, and 400 cubic inch engines, as well as many others. It works well with 1.7 ratio or higher rockers for increased lift. This part is not CARB approved and cannot be shipped to California.