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COMP Cams 12-407-8

Comp Cams Xtreme Energy Hydraulic Roller Camshafts

COMP Cams 12-407-8

249-12-407-8

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COMP Cams 12-407-8 Comp Cams Xtreme Energy Hydraulic Roller Camshafts $327.99
Xtreme Energy XR252HR-10 Retro-Fit Hydraulic Roller Camshaft
Lift: .472"/.480"
Duration: 252/258
Lobe Separation Angle: 110°
RPM Range: 600-4600

COMP Cams 12-407-8 Details

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

Hydraulic Roller-Smallest of the line, good for towing, excellent mileage, smooth idle.

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
Advertised Duration
252 int./258 exh.
Advertised Exhaust Duration
258
Advertised Intake Duration
252
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
Quantity
Sold individually
Valve Lift with Factory Rocker Arm Ratio
0.472 int./0.480 exh.
Valve Springs Required
Yes
Lobe Separation (Deg)
110
Manufacturer's Part Number:
12-407-8

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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