Does this camshaft fit my 1985 Chevrolet Camaro?

This camshaft is designed for flat tappet engines and does not fit factory roller camshaft blocks from 1985 and newer. Many Camaros from that year onward came with roller cams, so you'll need to confirm your specific engine's valvetrain type before installation.

What is the intended use for the COMP Cams CS 278Xo-8 camshaft?

This camshaft is part of COMP Cams' Oval Track series, intended for performance applications. It's well-suited for engines with 327-358 cubic inches, around 9:1 compression, and paired with a 2-barrel carburetor and good intake and exhaust systems.

Are there any special considerations for installing this camshaft on older engines?

Yes, 1955-1957 Chevrolet 265 engines require a specific oiling groove on the rear cam journal. This particular part number does not include that groove, so if your engine requires it, you'll need to contact us for assistance with a different option.

COMP Cams Oval Track Camshaft CS 278Xo-8

Name: COMP Cams Camshaft CS 278Xo-8
Brand: COMP Cams
SKU: comp-cams-comp-cams-camshaft-cs-278xo-8-t14-4390336
Price: 378.83 USD
Availability: BackOrder

COMP Cams Camshaft CS 278Xo-8

$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 Oval Track camshaft CS 278Xo-8OT for Chevrolet Small Block engines. Features a 248/250 duration for improved performance.

Key Features

Fits Chevrolet GEN 1 Small Blocks and many other vehicle makes and models.
Oval Track 248/250 solid flat tappet camshaft.
Designed for 327-358 cubic inch engines with 9:1 compression.
Features a 1/4-3/8 fast track design.
Not compatible with factory roller camshaft blocks from 1985 and newer or LS-based engines.
Requires a specific oiling groove on the rear journal for 1955-1957 Chevrolet 265 engines.

⚠️ 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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Product Details

This COMP Cams CS 278Xo-8 Oval Track camshaft is designed for Chevrolet Small Block engines, specifically for applications like the Camaro, Corvette, and various trucks and commercial chassis models. It's a solid flat tappet camshaft with a 248/250 degree intake/exhaust duration, intended for builds with 327-358 cubic inch displacement and around 9:1 compression, paired with a 2-barrel carburetor and good intake/exhaust systems. This camshaft is a popular choice for those looking to get more out of their GEN 1 Small Block Chevy.

The CS 278Xo-8 features a 1/4-3/8 fast track design, which helps with valve lift and timing. It's built for engines that use a flat tappet valvetrain, and it's important to note that it does not fit factory roller camshaft blocks from 1985 and newer, nor does it fit LS-based engines. For 1955-1957 models, a specific oiling groove is required on the rear journal, and this particular part number does not include it.

When installing this camshaft, it's crucial to confirm your engine's valvetrain type. Many trucks and SUVs continued with flat tappet cams well into the mid-90s, while performance cars like Camaros and Corvettes transitioned to rollers earlier. Always refer to the manufacturer's installation instructions for proper setup and break-in procedures to ensure optimal performance and longevity.