0
Shop By Vehicle
Top Categories
All Categories

Top Categories

All Categories


Hi, ! (Not you?)
My Account
Track Order
Help
Contact Us
COMP Cams 12-423-8

COMP Cams Comp Cams Xtreme Energy Hydraulic Roller Camshafts

249-12-423-8

Free Shipping Ships

$270.99
COMP Cams Comp Cams Xtreme Energy Hydraulic Roller Camshafts $270.99
QTY
Xtreme Energy XR676HR Retro-Fit Hydraulic Roller Camshaft
Lift: .502''/.510''
Duration: 276°/282°
Lobe Separation Angle: 110°
RPM Range: 1900-5600

COMP Cams 12-423-8 Details

Chevy 262-400ci Small Block 1955-98
For engines NOT originally equipped with a hydraulic roller camshaft.

High Performance street machines 2000+ stall converter lower gear ratio recommended choppy idle.

Specifications:

Intake Valve Lift (in.)
0.502
Exhaust Valve Lift (in.)
0.51
RPM Range
1900-5600
Int. Duration @ .050 in. (Deg)
224
Exh. Duration @ .050 in. (Deg)
230
Int. Duration Advertised (Deg)
276
Exh. Duration Advertised (Deg)
282
Engine Make/Size
Chevy Small Block (262-400)
Lifter Type
Hydraulic Roller
Usage
Street/Performance
Advertised Duration
276 int./282 exh.
Advertised Exhaust Duration
282
Advertised Intake Duration
276
Basic Operating RPM Range
1,900-5,600
Cam Style
Hydraulic roller tappet
Computer-Controlled Compatible
No
Duration at 050 inch Lift
224 int./230 exh.
Exhaust Duration at 050 inch Lift
230
Exhaust Valve Lift with Factory Rocker Arm Ratio (
0.51
Grind Number
CS XR276HR-10
Intake Duration at 050 inch Lift
224
Intake Valve Lift with Factory Rocker Arm Ratio (i
0.502
Quantity
Sold individually
Valve Lift with Factory Rocker Arm Ratio
0.502 int./0.510 exh.
Valve Springs Required
Yes
Lobe Separation (Deg)
110
Manufacturer's Part Number:
12-423-8

The Leading Edge of Valve Train Technology

Comp Cams Xtreme Energy series can be used in any street or street/strip application where both throttle response and top-end horsepower is desired. These camshafts are designed to take advantage of the latest improvements in valve train components and the newest developments in camshaft design. Their aggressive lobe design produces better throttle response and top end horsepower than other cams with the same duration @ .050'' lift, while delivering increased engine vacuum. We do not recommend the use of stock valve train components with these camshafts due to the aggressive lobe designs.

Features:
  • Quicker opening lobe profiles deliver increased responsiveness & more area under the lift curve
  • More vacuum allows an increase in duration for improved performance and assists power brakes
  • Excellent performance in street carbureted applications
  • Best performance with aftermarket intake manifolds, headers, lower gear ratios

    Camshaft & Lifter Kits are indicated by a CL in their part number and include Camshaft, Lifters, Assembly Lube, Decals, and Instructions.

    Complete Kits are indicated by a K in their part number and include Camshaft, Lifters, Timing Chain & Gears, Valve Springs, Retainers, Locks, Assembly Lube, Decals, and Instructions.

    Small Kits are indicated by a SK in their part number and include Camshaft, Lifters, Timing Chain Set, Assembly Lube, Decals, and Instructions.

  • Items You Need

    Some parts are not legal for use in California or other states with similar laws / regulations

    Motor Vehicles

    WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.

    Tools:

    WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.

    Electrical Cords

    WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.