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COMP Cams 12-252-4 Xtreme Turbo Hydraulic Flat Tappet Camshaft Duration - 212/212

(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

12-252-4
12 reviews
Sale Price

$309.95

1 left at this price

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Product Details

The COMP Cams Xtreme Turbo 12-252-4 is a hydraulic flat tappet camshaft engineered specifically for turbocharged and supercharged Chevrolet small block engines. This camshaft features a symmetrical 212/212 duration profile (measured at .050" lift) that delivers excellent boost-friendly characteristics with reduced overlap to minimize reversion and maximize cylinder pressure under forced induction.

Key Specifications:

  • Duration at .050": 212°/212° (intake/exhaust)
  • Advertised duration: 268°/268°
  • Valve lift: .447"/.447" (with 1.5:1 rocker ratio)
  • Lobe separation angle: 114°
  • Hydraulic flat tappet design for reliability and quiet operation
  • Optimized for turbo and supercharger applications

Performance Characteristics:

  • Tight lobe separation angle reduces overlap for better boost response
  • Smooth idle quality with mild lope
  • Strong mid-range to upper RPM power band
  • Recommended RPM range: 1,500-6,000 RPM
  • Works well with stock or aftermarket cylinder heads

This camshaft is ideal for street/strip turbocharged small block Chevy builds ranging from 283ci to 400ci. The Xtreme Turbo grind provides the perfect balance of streetability and performance for forced induction applications. Compatible with stock hydraulic lifters and valve train components, though upgraded valve springs are recommended to prevent float at higher RPM ranges.

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

263

Basic Operating RPM Range

1,800-6,000

Grind Number

XT256H

Cam Type

Hydraulic Flat Tappet

Exhaust Valve Lift

0.444

Intake Valve Lift

0.447

Camshaft Material

Cast Iron

Camshaft Series

Xtreme Turbo

Assembly Lubricant Included

Yes

Lifters Included

No

LOBE SEPARATION

112

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.

Camshaft Gear Attachment

3-Bolt

Usage

Street/Strip

Exhaust Duration at .050 inch Lift

212

Intake Duration at .050 Inch Lift

212

Advertised Intake Duration

256

Engine Family

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

AMAZON ASIN

B000P5D804

Autoplicity had all the parts I needed to refurbish my Norcold refrigerator for a very good price. Shipping was fast and everything showed up in great condition and on time.

Great price!!!

Great communication, fast shipping.

Product was well packaged. The only downside to this product is that it does not come with a new manifold gasket or new mounting hardware for the headers.

Lots if Auto parts in stock with cheaper prices. Wish you accepted coupons.

Great prices and quick shipping! They kept me informed of when the item was shipped also. Couldn't be happier!

Lowest prices I found on the net and great customer service! Fast shipping too!

Nice website, easy to order

GREAT SERVICE, FAST SHIPPING, WILL USE AGAIN

Great prices and easy transaction

Excellent service. I called in Monday for a hard to find item which I had ordered from several other online shops who despite saying were In Stock online were not actually in stock at all and the orders were canceled after waiting a week to find out. They had the item in stock as listed on their website and shipped the next day. The price was the cheapest of anyone who actually had the item in stock by a substantial amount.

Best price around, very fast shipping and great service! I will buy from them again!

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