How do I know if my Chevrolet Small Block has a flat tappet camshaft?

You'll need to remove the intake manifold or timing cover to visually inspect the camshaft. If the lifters have a flat bottom that rides directly on the cam lobe, it's a flat tappet system. If the lifters have a roller mechanism, it's a roller camshaft, and this kit will not be compatible.

What is included in the COMP Cams Cam & Lifter Kit?

This kit comes complete with the camshaft, a set of matching lifters, assembly lube for proper installation and break-in, and decals for your engine bay.

Does this camshaft fit my 1990 Chevrolet 350 engine?

It depends on whether your 1990 350 engine is equipped with a factory roller camshaft or a flat tappet camshaft. Many Chevrolet engines from the mid-80s onward gradually transitioned to roller cams. You will need to confirm your specific engine's camshaft type; this kit is only compatible with flat tappet systems.

COMP Cams Cam & Lifter Kit CL12-674-4 - Chevrolet Small Bloc

Name: COMP Cams Cam & Lifter Kit CS XS256S-10
Brand: COMP Cams
Price: 433.87 USD
Availability: InStock

COMP Cams Cam & Lifter Kit CS XS256S-10

$433.87

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 Cam & Lifter Kit CL12-674-4. Boosts torque and improves idle for many Chevrolet Small Block engines.

Key Features

Fits many Chevrolet GEN 1 Small Block engines including 262, 265, 267, 283, 302, 305, 307, 327, 350 and 400.
Provides strong torque through the low end and mid-range with a good idle.
Includes camshaft, lifters, assembly lube, and decals.
Xtreme Energy series camshaft designed for improved performance.
Solid flat tappet design for compatible engines.
Part number CL12-674-4.

⚠️ 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

If you're looking to get more low-end and mid-range torque out of your classic Chevrolet Small Block, this COMP Cams Xtreme Energy cam and lifter kit is a solid option. It's designed to give you a noticeable boost in pulling power right where you need it, without making your engine idle rough. This kit is built for a wide range of Chevrolet GEN 1 Small Block engines, including popular displacements like the 350, 327, and 283, and it's a great way to wake up older engines that still use a flat tappet camshaft system. You'll find it fits many vehicles from the 80s and 90s, like the Chevrolet C10, Camaro, and Caprice, but it's important to confirm your specific engine uses a flat tappet design, as many later models switched to roller cams.

Inside this kit, you'll find everything you need to get the job done: the camshaft itself, a set of matching lifters, assembly lube to ensure proper break-in, and decals. The Xtreme Energy series is well-known for its ability to create strong torque curves, and this particular grind, the CS XS256S-10, is tuned for that strong low-to-mid range pull with a good, stable idle. It’s a well-built kit that offers a significant improvement over stock camshafts for drivers who want more responsive power for everyday driving or hauling.