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COMP Cams 12-560-4 Nitrous HP Hydraulic Flat Tappet Camshaft 224/236

(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 + 241 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

12-560-4
5 reviews
Sale Price

$309.95

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Product Details

The COMP Cams 12-560-4 Nitrous HP camshaft is specifically engineered for Chevrolet small block engines running nitrous oxide systems. This hydraulic flat tappet cam features an aggressive 224/236 duration split designed to maximize power under nitrous while maintaining smooth idle characteristics and excellent throttle response on motor.

Camshaft Specifications:

  • Advertised Duration: 268°/280° intake/exhaust
  • Duration @ .050": 224°/236° intake/exhaust
  • Valve Lift: .454"/.480" intake/exhaust (with 1.5:1 rocker ratio)
  • Lobe Separation Angle: 110°
  • Hydraulic flat tappet design for durability and quiet operation
  • Optimized for engines with nitrous oxide injection systems

Key Features:

  • Broader exhaust duration helps evacuate cylinder pressure from nitrous combustion
  • 110° LSA provides strong mid-range torque and good vacuum for power brakes
  • Compatible with stock to mildly modified cylinder heads and intake systems
  • Recommended for engines with 9.0:1 to 10.5:1 compression ratio
  • Designed for street/strip applications with 75-250 HP nitrous systems
  • Requires 2,000-6,000 RPM operating range with 5,800 RPM redline

This camshaft is ideal for enthusiasts looking to add nitrous to a street-driven Chevrolet small block while maintaining drivability. The hydraulic flat tappet design eliminates the need for constant valve lash adjustment. Works with stock valve springs when nitrous shot is under 150 HP; upgraded springs recommended for larger nitrous systems.

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 + 237 more models

Basic Operating RPM Range

2,000-6,200

Grind Number

NX268H

Cam Type

Hydraulic Flat Tappet

Exhaust Valve Lift

0.49

Intake Valve Lift

0.477

Camshaft Material

Cast Iron

Cam and Lifter Kit Upgrade

CL12-560-4

K-Kit Upgrade

K12-560-4

Camshaft Series

Nitrous HP

SK-Kit Upgrade

SK12-560-4

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

268

Camshaft Gear Attachment

3-Bolt

LOBE SEPARATION

113

Exhaust Duration at .050 inch Lift

236

AMAZON ASIN

B000V9CVAW

Advertised Exhaust Duration

286

Usage

Street/Strip

Intake Duration at .050 Inch Lift

224

Engine Family

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

This was my first purchase from Autoplicity, I bought a HyperTech tuner for my truck, they had absolutely the lowest price of anywhere I looked by far. Only thing I could fault them on is that it took 3 days for the product to ship, a little bit long I feel for something that was in stock, but Ill overlook it since it was such a great price.

Autoplicity was quick, and fast! the shipping was standard but arrived in five days! I would definetly recommend them!

Best price.

Great product. Great service. Delivered on time as usual!

I ordered a water pump from them and that Amazon was advertising as a Chrome pump. When I discovered it was not chrome, I asked to cancel the order which was prior to shipping notification. I was told by customer service it had already been sent and I would have to wait until the item was sent for a return to be processed. The return was sent back and all money was credited to my account as promised.

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