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COMP Cams 12-408-8

COMP Cams Comp Cams Xtreme Energy Hydraulic Roller Camshafts

249-12-408-8

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$296.99
COMP Cams Comp Cams Xtreme Energy Hydraulic Roller Camshafts $296.99
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Xtreme Energy XR258HR Retro-Fit Hydraulic Roller Camshaft
Lift: .480"/.487"
Duration: 258/264
Lobe Separation Angle: 110°
RPM Range: 1000-5000

COMP Cams 12-408-8 Details

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

Hydraulic Roller-Strong torque, good mileage, stock to mildly modified combinations.

Specifications:

Exh. Duration @ .050 in. (Deg)
212
Exh. Duration Advertised (Deg)
264
Exhaust Valve Lift (in.)
0.487
Int. Duration @ .050 in. (Deg)
206
Intake Valve Lift (in.)
0.480
Usage
Street/Performance
Quantity
Sold individually
Lobe Separation (Deg)
110
Exhaust Valve Lift with Factory Rocker Arm Ratio (
0.487
Intake Valve Lift with Factory Rocker Arm Ratio (i
0.48
Valve Lift with Factory Rocker Arm Ratio
0.480 int./0.487 exh.
Advertised Duration
258 int./264 exh.
Computer-Controlled Compatible
No
Valve Springs Required
Yes
Cam Style
Hydraulic roller tappet
Exhaust Duration at 050 inch Lift
212
Intake Duration at 050 inch Lift
206
Duration at 050 inch Lift
206 int./212 exh.
Advertised Intake Duration
258
Advertised Exhaust Duration
264
Basic Operating RPM Range
1,000-5,000
Grind Number
CS XR258HR-10
Manufacturer's Part Number:
12-408-8
Shipping Weight:
9
Package Height:
2.75
Package Depth:
24.5
Package Width:
2.87

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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