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COMP Cams 24-710-11 Xtreme Energy Hydraulic Roller Camshaft Chrysler Hemi - XR280HR-10 for 426

Part of: COMP Cams Xtreme Energy Hydraulic Roller Camshaft GM

Other options in this family: COMP Cams 08-500-8 COMP Cams 20-811-9 COMP Cams 20-810-9 COMP Cams 07-503-8 COMP Cams 12-408-8

Manufacturer

Picture for manufacturer COMP Cams

Part Number

24-710-11
14 reviews
Sale Price

$608.95

Estimated ship date Monday, November 23

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Product Details

The COMP Cams 24-710-11 Xtreme Energy Hydraulic Roller Camshaft (grind XR280HR-10) is a retro-fit hydraulic roller cam purpose-built for the Chrysler 426 Hemi. Engineered for high-performance street and street/strip applications, this camshaft delivers an outstanding combination of throttle response, engine vacuum, and top-end horsepower thanks to COMP Cams' aggressive lobe profile design.

With 230°/236° duration at .050" lift, advertised duration of 280°/288°, and valve lift of 0.566" intake / 0.544" exhaust (with factory rocker arm ratio), this cam is tuned for a broad power band spanning 2,500–6,000 RPM. The 110° lobe separation angle provides strong street manners while supporting serious performance gains. The three-bolt camshaft gear attachment is compatible with the 426 Hemi's factory cam gear interface.

Key Specifications:

  • Grind Number: XR280HR-10
  • Cam Style: Hydraulic Roller, Retro-Fit
  • Intake Duration @ .050" Lift: 230°
  • Exhaust Duration @ .050" Lift: 236°
  • Advertised Intake Duration: 280°
  • Advertised Exhaust Duration: 288°
  • Intake Valve Lift (factory rocker ratio): 0.566"
  • Exhaust Valve Lift (factory rocker ratio): 0.544"
  • Lobe Separation Angle: 110°
  • Camshaft Gear Attachment: 3-Bolt
  • Basic Operating RPM Range: 2,500–6,000
  • Computer-Controlled Compatible: No
  • Sold Individually

Recommended Engine Setup:

  • 3.91 or numerically higher rear gear ratio
  • 2,500+ stall torque converter
  • 9.5:1 compression ratio minimum
  • Aftermarket intake manifold
  • Headers required

Important: Upgraded valve springs are required. Stock valvetrain components are not compatible with this camshaft's aggressive lobe design. This cam is not computer-controlled (EFI) compatible.

Products specifications

Advertised Exhaust Duration

288

Basic Operating RPM Range

2,200-6,000

Grind Number

XR280HR-10

Exhaust Valve Lift

0.544

Intake Valve Lift

0.566

Engine Family

Chrysler 426 HEMI 8 Cylinder (1966-1971)

Usage

Street/Performance

Assembly Lubricant Included

No

Lifters Included

No

LOBE SEPARATION

110

Valve Springs Required

Yes

Prop 65

WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov

C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967?

Yes, but must meet tailpipe emission standards for year of vehicle.

C.A.R.B. Exempt for On-Road Vehicles?

No

C.A.R.B. Exempt for Racing and Off-Road Only Vehicles?

Yes, but must be a race/competition only vehicle.

C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965?

Yes, but must meet tailpipe emission standards for year of vehicle.

C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967?

Yes, but must meet tailpipe emission standards for year of vehicle.

Camshaft Gear Attachment

3-Bolt

Lifter Type

Hydraulic Roller

Exhaust Duration at .050 inch Lift

236

Intake Duration at .050 Inch Lift

230

Cam Type

Hydraulic Roller

Camshaft Material

Billet Steel

Advertised Intake Duration

280

Camshaft Series

Xtreme Energy

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