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COMP Cams K12-407-8

Comp Cams 'Xtreme Energy' Hydraulic Roller Camshafts

COMP Cams K12-407-8

249-K12-407-8

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Ships 12/19/16 if Ordered Today
COMP Cams K12-407-8 Comp Cams 'Xtreme Energy' Hydraulic Roller Camshafts $973.99
Xtreme Energy XR252HR-10 Retro-Fit Hydraulic Roller Camshaft Complete Kit
Lift: .472"/.480"
Duration: 252/258
Lobe Separation Angle: 110°
RPM Range: 600-4600

COMP Cams K12-407-8 Details

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

  • Produces Better Throttle Response
  • Produces Top Engine Horsepower
  • Delivers Increased Engine Vacuum
  • 1 Year Limited Warranty

  • Specifications:

    Intake Valve Lift (in.)
    0.472
    Exhaust Valve Lift (in.)
    0.48
    Int. Duration @ .050 in. (Deg)
    200
    Exh. Duration @ .050 in. (Deg)
    206
    Int. Duration Advertised (Deg)
    252
    Exh. Duration Advertised (Deg)
    258
    RPM Range
    600-4600
    Engine Make/Size
    Chevy Small Block (262-400)
    Lifter Type
    Hydraulic Roller
    Usage
    Street/Performance
    Gaskets Included
    No
    Advertised Duration
    252 int./258 exh.
    Advertised Exhaust Duration
    258
    Advertised Intake Duration
    252
    Assembly Lubricant Included
    No
    Basic Operating RPM Range
    600-4,600
    Cam Style
    Hydraulic roller tappet
    Computer-Controlled Compatible
    No
    Duration at 050 inch Lift
    200 int./206 exh.
    Exhaust Duration at 050 inch Lift
    206
    Exhaust Valve Lift with Factory Rocker Arm Ratio (
    0.48
    Grind Number
    CS XR252HR-10
    Intake Duration at 050 inch Lift
    200
    Intake Valve Lift with Factory Rocker Arm Ratio (i
    0.472
    Lifter Style
    Hydraulic roller
    Lifters Included
    Yes
    Locks Included
    Yes
    Outside Diameter of Outer Spring (in.)
    1.254
    Pushrods Included
    Yes
    Quantity
    Sold as a kit
    Retainers Included
    Yes
    Rocker Arms Included
    No
    Timing Chain and Gears Included
    Yes
    Timing Chain Style
    Double non-roller
    Valve Lift with Factory Rocker Arm Ratio
    0.472 int./0.480 exh.
    Valve Springs Included
    Yes
    Valve Springs Required
    No
    Valve Stem Seals Included
    Yes
    Lobe Separation (Deg)
    110
    Manufacturer's Part Number:
    K12-407-8

    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.

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