What is the recommended break-in procedure for this camshaft?

Proper break-in is critical for hydraulic flat tappet camshafts. You'll need to run the engine at 2000-2500 RPM for about 20 minutes immediately after installation to properly seat the lifters and prevent damage. Always refer to the manufacturer's specific instructions for the most accurate procedure.

How can I tell if my engine has a flat tappet or roller camshaft?

You'll need to remove the intake manifold or timing cover to inspect the valvetrain. Factory roller camshafts have lifters with a roller on the bottom that rides on the cam lobe, while flat tappet lifters have a flat bottom that slides directly on the cam lobe. Many GM trucks and SUVs used flat tappet cams until the mid-90s.

Does this camshaft come with lifters or other valvetrain components?

This product is for the camshaft only. Lifters, valve springs, retainers, and pushrods are typically sold separately and should be chosen to match the camshaft's specifications for optimal performance and reliability.

COMP Cams CS 270H-10 Camshaft 12-211-2

Name: COMP Cams Camshaft CS 270H-10
Brand: COMP Cams
Price: 251.96 USD
Availability: InStock

COMP Cams Camshaft CS 270H-10

$251.96

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

COMP Cams CS 270H-10 camshaft for Small Block Chevy engines. Offers improved performance for 262-400 c.i.d. engines with flat tappet cams.

Key Features

Fits 1958-1998 Chevrolet Small Block engines with flat tappet camshafts.
Hydraulic flat tappet design for improved performance.
Intake and exhaust duration at .050 lift is 224 degrees.
Works with stock torque converters, but performs best with a 2000+ RPM stall speed.
Mildly rough idle provides a noticeable performance sound.
Designed for 262-400 cubic inch engine displacements.

⚠️ 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 is the COMP Cams CS 270H-10 camshaft, a hydraulic flat tappet grind designed for a wide range of Small Block Chevrolet engines from 1958 through 1998. It's a popular choice for builders looking to get more performance out of their classic Chevy V8s, like those found in Camaros, Corvettes, and many pickup trucks.

The CS 270H-10 is a high-performance camshaft that offers a noticeable bump in power. It features a 224-degree intake and 224-degree exhaust duration at .050 lift, making it one of the larger cams that can work with a stock torque converter, though you'll see even better results with a 2000+ RPM stall converter and lower rear-end gears. Expect a mild, rough idle with this cam, which is characteristic of its aggressive profile. It's built for engines that use a traditional flat tappet valvetrain, so be sure to check your block to confirm it's not a factory roller setup, especially on later model engines.

When installing this camshaft, it's crucial to ensure proper break-in procedures are followed to seat the flat tappets correctly and prevent premature wear. If you're working on a 1955-1957 Chevrolet 265 engine, you'll need to verify that the 5th cam journal has an oiling groove; if not, contact COMP Cams for specific guidance.