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COMP Cams 12-407-8 Xtreme Energy Hydraulic Roller Camshaft Small Block Chevy

(GMC G2500 1979-95, Yukon 1992-95, K1500 1979-86, 1988-95, C1500 1979-86, 1988-95, K2500 1979-86, 1988-95, Jimmy 1970-91 + 238 more models)

Part of: COMP Cams Xtreme Energy Hydraulic Roller Camshaft Ford Small Block

Other options in this family: COMP Cams 08-423-8 COMP Cams 31-491-9 COMP Cams 31-492-9 COMP Cams 08-408-8 COMP Cams 12-412-8

Manufacturer

Picture for manufacturer COMP Cams

Part Number

12-407-8
4 reviews
Sale Price

$502.76

Estimated ship date Sunday, November 22

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Product Details

The COMP Cams Xtreme Energy 12-407-8 hydraulic roller camshaft is engineered specifically for Small Block Chevrolet engines seeking aggressive performance with reliable street manners. This camshaft delivers excellent throttle response and strong mid-range power, making it ideal for street/strip applications and aggressive street machines.

Camshaft Specifications:

  • Duration at 0.050": 200°/206° (Intake/Exhaust)
  • Advertised Duration: 268°/274°
  • Valve Lift: 0.447"/0.454" (with 1.5 ratio rockers)
  • Lobe Separation Angle: 115°
  • Hydraulic roller design for reduced friction and improved durability
  • Recommended RPM Range: 1,200-5,500 RPM
  • Designed for use with factory or aftermarket fuel injection and carbureted setups

Performance Characteristics:

  • Produces a noticeable performance idle with good vacuum
  • Excellent power gains from idle through mid-range
  • Maintains good driveability for daily driving applications
  • Works well with stock or mildly modified cylinder heads
  • Compatible with stock torque converters and rear gear ratios (3.08 and higher recommended)

This camshaft is part of COMP Cams' Xtreme Energy series, which utilizes advanced lobe designs to maximize performance across the powerband. Hydraulic roller lifters are required and sold separately. Valve spring upgrades are typically recommended to prevent valve float at higher RPM ranges.

Products specifications

Fits

GMC G2500 1979-95, Yukon 1992-95, K1500 1979-86, 1988-95, C1500 1979-86, 1988-95, K2500 1979-86, 1988-95, Jimmy 1970-91, C3500 1979-86, 1988-95, K2500 Suburban 1979-86, 1992-95, K3500 1979-86, 1988-95, C15/C1500 Pickup 1967-74 + 234 more models

Basic Operating RPM Range

600-4,600

Grind Number

XR252HR

Intake Valve Lift

0.472

Intake Duration at .050 Inch Lift

200

Exhaust Duration at .050 inch Lift

206

Camshaft Material

Austempered Ductile Iron

Cam and Lifter Kit Upgrade

CL12-407-8

K-Kit Upgrade

K12-407-8

SK-Kit Upgrade

SK12-407-8

Usage

Street/Performance

Assembly Lubricant Included

No

Lifters Included

No

LOBE SEPARATION

110

Valve Springs Required

Yes

Prop 65

WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov

C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967?

Yes, but must meet tailpipe emission standards for year of vehicle.

C.A.R.B. Exempt for On-Road Vehicles?

No

C.A.R.B. Exempt for Racing and Off-Road Only Vehicles?

Yes, but must be a race/competition only vehicle.

C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965?

Yes, but must meet tailpipe emission standards for year of vehicle.

C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967?

Yes, but must meet tailpipe emission standards for year of vehicle.

Camshaft Gear Attachment

3-Bolt

Lifter Type

Hydraulic Roller

Advertised Exhaust Duration

258

Cam Type

Hydraulic Roller

Advertised Intake Duration

252

Exhaust Valve Lift

0.48

Engine Family

Chevrolet 262-400 c.i. 8 Cylinder (1958-1998)

Camshaft Series

Xtreme Energy

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Autoplicity had the products I was looking for at a great price. Their site made for an easy transaction. Their customer service on the phone was helpful as well. Can't wait to get the parts incstalled on my truck.

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Processed and shipped fast. I was a little upset with them shipping my Eibach springs in the Eibach box, and not repackaging it. Everyone could see the box, and knew what was in it. But this will not stop me from ordering again.

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