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COMP Cams 11-408-8

COMP Cams Comp Cams Xtreme Energy Hydraulic Roller Camshafts

249-11-408-8

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$280.99
COMP Cams Comp Cams Xtreme Energy Hydraulic Roller Camshafts $280.99
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Xtreme Energy Retro-Fit XR258HR-10 Hydraulic Roller Camshaft
Lift: .510"/.510"
Duration: 258/264
Lobe Separation Angle: 110°
RPM Range: 1000-5000

COMP Cams 11-408-8 Details

Chevrolet Big Block 396-454 c.i. 8 CYL. 1965-1996

Hydraulic Roller-Strong torque, good mileage, RV and towing, use in stock applications.

Specifications:

Exhaust Valve Lift (in.)
0.51
Intake Valve Lift (in.)
0.510
RPM Range
1000-5000
Int. Duration @ .050 in. (Deg)
206
Exh. Duration @ .050 in. (Deg)
212
Int. Duration Advertised (Deg)
258
Exh. Duration Advertised (Deg)
264
Engine Make/Size
Chevy Big Block (396-454)
Lifter Type
Hydraulic Roller
Usage
Street/Performance
Advertised Duration
258 int./264 exh.
Advertised Exhaust Duration
264
Advertised Intake Duration
258
Basic Operating RPM Range
1,000-5,000
Cam Style
Hydraulic roller tappet
Computer-Controlled Compatible
No
Duration at 050 inch Lift
206 int./212 exh.
Exhaust Duration at 050 inch Lift
212
Exhaust Valve Lift with Factory Rocker Arm Ratio (
0.51
Grind Number
XR258HR
Intake Duration at 050 inch Lift
206
Intake Valve Lift with Factory Rocker Arm Ratio (i
0.51
Quantity
Sold individually
Valve Lift with Factory Rocker Arm Ratio
0.510 int./0.510 exh.
Valve Springs Required
Yes
Lobe Separation (Deg)
110
Manufacturer's Part Number:
11-408-8

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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