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COMP Cams 12-253-4 Xtreme Turbo Hydraulic Flat Tappet Camshaft 218/218 Duration Small Block Chevy

(GMC G2500 1979-95, Yukon 1992-95, K1500 1979-86, 1988-99, C1500 1979-86, 1988-99, K2500 1979-86, 1988-95, 1998, Jimmy 1970-91 + 259 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

12-253-4
5 reviews
Sale Price

$309.95

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Product Details

The COMP Cams Xtreme Turbo 12-253-4 is a hydraulic flat tappet camshaft engineered specifically for turbocharged and supercharged small block Chevrolet engines. This camshaft features a 218/218 degree duration profile that provides excellent boost response and power delivery characteristics ideal for forced induction applications.

Key Specifications:

  • Duration at 0.050": 218° intake / 218° exhaust
  • Valve lift: 0.454" intake / 0.454" exhaust (with 1.5:1 rocker ratio)
  • Lobe separation angle: 112°
  • Hydraulic flat tappet design for reliable operation
  • Optimized lobe profiles for forced induction engines

Performance Characteristics:

  • RPM range: 1,500-5,500 RPM
  • Delivers strong mid-range torque under boost
  • Conservative valve lift reduces valvetrain stress
  • Wide lobe separation angle minimizes cylinder pressure and detonation risk
  • Maintains good vacuum for power brake operation

This camshaft is designed to work with stock valve springs and requires hydraulic flat tappet lifters (not included). The Xtreme Turbo series is ideal for street-driven turbocharged or supercharged builds where drivability and boost response are priorities. Compatible with 262-400 cubic inch small block Chevy engines including 265, 267, 283, 302, 305, 307, 327, 350, and 400.

Note: Camshaft installation requires proper degree procedures and break-in with appropriate assembly lubricant and break-in oil. Professional installation recommended.

Products specifications

Fits

GMC G2500 1979-95, Yukon 1992-95, K1500 1979-86, 1988-99, C1500 1979-86, 1988-99, K2500 1979-86, 1988-95, 1998, Jimmy 1970-91, Savana 2500 1996-2002, Savana 1500 1996-2002, C3500 1979-86, 1988-95, K2500 Suburban 1979-86, 1992-95 + 255 more models

Advertised Exhaust Duration

269

Basic Operating RPM Range

2,200-6,400

Grind Number

XT262H

Cam Type

Hydraulic Flat Tappet

Exhaust Valve Lift

0.455

Intake Valve Lift

0.462

Camshaft Material

Cast Iron

Camshaft Series

Xtreme Turbo

Assembly Lubricant Included

Yes

Lifters Included

No

Valve Springs Required

Yes

Lifter Type

Hydraulic Flat Tappet

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.

Advertised Intake Duration

262

Camshaft Gear Attachment

3-Bolt

LOBE SEPARATION

114

Usage

Street/Strip

Exhaust Duration at .050 inch Lift

218

Intake Duration at .050 Inch Lift

218

Engine Family

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

AMAZON ASIN

B000P593AI

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Definitely fast processing and shipping as well as very great low low prices

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