What other parts are recommended to get the most out of this camshaft?

For optimal performance, COMP Cams recommends using their roller rockers and matched valve springs. Additionally, other performance parts such as an aftermarket intake manifold and headers are typically required to achieve the best results from this camshaft.

Will this camshaft work with my factory roller camshaft block?

No, this camshaft is designed for flat tappet camshaft blocks. It is not compatible with factory roller Small Blocks produced from 1985 and newer, including LT1/LT4 engines. You may need to remove the intake or timing cover to confirm your block's type.

What kind of idle can I expect with this camshaft?

This Xtreme Energy camshaft is designed to provide a smooth idle for street applications, even with its performance enhancements. While it offers a significant increase in torque and power, it aims to maintain quiet valve train operation and a manageable idle for daily driven vehicles.

COMP Cams Hydraulic Roller Camshaft XR276HR-10 12-423-8

Name: COMP Cams Camshaft CS XR276HR-10
Brand: COMP Cams
SKU: comp-cams-comp-cams-camshaft-cs-xr276hr-10-t14-4390235
Price: 610.12 USD
Availability: BackOrder

COMP Cams Camshaft CS XR276HR-10

$610.12

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 Xtreme Energy hydraulic roller camshaft for Chevy Small Block. Grind #XR276HR-10. Part# 12-423-8. Verified fitment. Fast shipping.

Key Features

Fits 106+ vehicle make/model combinations.
Xtreme Energy 224/230 hydraulic roller camshaft for Chevrolet Small Block engines.
Offers strong torque, excellent mileage, and a smooth idle.
Quicker opening lobe profiles deliver increased responsiveness and more area under the lift curve.
Provides more vacuum, allowing for a step up in duration for greater performance.
Duration @ 0.050": 224° intake / 230° exhaust.

⚠️ 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

Secure CheckoutFast Shipping631-982-0042

Will this fit your vehicle?

Product Details

This COMP Cams Xtreme Energy camshaft is a hydraulic roller grind, specifically the XR276HR-10, designed for Chevrolet Small Block engines. You'll receive the camshaft itself, ready for installation. This camshaft is built to bridge the gap between milder street cams and aggressive race-only grinds, offering a notable increase in torque and power while maintaining a smooth idle and good vacuum for street applications. It's a popular choice for builders looking for strong all-around performance, especially in carbureted setups.

The XR276HR-10 features quicker opening lobe profiles, which contribute to improved responsiveness and a broader powerband, often referred to as more 'area under the lift curve.' This design also helps generate more vacuum, allowing for a step up in duration for greater overall performance. With a duration of 224 degrees at 0.050 inches on the intake and 230 degrees on the exhaust, and a maximum lift of .502 inches with 1.5 ratio rocker arms, this cam is well-suited for engines with a 2000+ RPM stall speed torque converter, aftermarket intake manifolds, headers, and gears. It's designed for durability in daily driven vehicles, ensuring quiet valve train operation.

For optimal performance, COMP Cams recommends pairing this camshaft with their roller rockers and matched valve springs. Keep in mind that other performance parts like an upgraded intake manifold and headers are necessary to achieve the best results from this camshaft. This camshaft fits a wide range of Chevrolet Small Block Gen 1 engines, including popular displacements like the 350, 327, and 400 cubic inch variants, but it's important to verify your specific engine's compatibility, as factory roller blocks from 1985 and newer are not compatible. This part is not CARB approved and cannot be shipped to California.