What is the primary benefit of the 4/7 swap design on this camshaft?

The 4/7 swap design changes the firing order of the cylinders. This can lead to improved exhaust scavenging and a smoother idle, contributing to better overall engine performance and a more consistent power band.

What other components are recommended when installing this camshaft?

For optimal performance, it is recommended to use headers and a torque converter with at least a 2500 RPM stall speed. Proper valve springs and lifters compatible with the camshaft's specifications are also essential.

Are there any specific engine models this camshaft will NOT fit?

Yes, this camshaft will not fit 1965-1966 Big Block Chevrolet engines that have an oiling groove in the rear journal. If your engine has this specific feature, you will need to contact the manufacturer for a different camshaft option.

COMP Cams Camshaft CB 47S XE274H-10 11-650-47

Name: COMP Cams Camshaft CB 47S XE274H-10
Brand: COMP Cams
Price: 375.76 USD
Availability: InStock

COMP Cams Camshaft CB 47S XE274H-10

$375.76

On Backorder

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

This COMP Cams camshaft is designed for Chevrolet Big Block 396-454 engines, offering strong mid-range performance. It requires headers and a 2500+ stall converter.

Key Features

Fits Chevrolet GEN IV 396-454 Big Block Engines Originally Equipped with Flat Tappet Camshafts.
Xtreme Energy 4/7 Swap camshaft design.
Intake/Exhaust Duration at 0.050 inch lift: 230/236 degrees.
Lobe Separation Angle: 110 degrees.
Designed for high performance street use with strong mid-range power.
Requires headers and a 2500+ RPM stall torque converter for optimal performance.

⚠️ 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

When you're looking to get more out of your Chevrolet Big Block engine, this COMP Cams Xtreme Energy 4/7 Swap camshaft is a solid option. It's built for high-performance street use and is designed to give you a strong mid-range power band. This camshaft is compatible with a wide range of Chevrolet vehicles originally equipped with flat tappet camshafts, including models like the 1967-1975 Chevrolet Bel Air, 1967-1973 Chevrolet Chevelle, and 1967-1974 Chevrolet Corvette.

The XE274H-10 features a 230/236 degree intake/exhaust duration at 0.050 inch lift and a 110-degree lobe separation angle, which contributes to its improved mid-range torque. To take full advantage of this camshaft's performance potential, you'll want to pair it with headers and a torque converter with at least a 2500 RPM stall speed. This setup will help ensure the engine breathes effectively and the power band is utilized properly.

This camshaft is a direct replacement for engines originally equipped with flat tappet camshafts. It's important to note that this part is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper setup and break-in procedures.