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COMP Cams 12-477-44 Xtreme Energy Hydraulic Roller Camshaft for Chevrolet Small Block

(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 GM

Other options in this family: COMP Cams 08-500-8 COMP Cams 20-811-9 COMP Cams 20-810-9 COMP Cams 07-503-8 COMP Cams 12-408-8

Manufacturer

Picture for manufacturer COMP Cams

Part Number

12-477-44
14 reviews
Sale Price

$682.95

Estimated ship date Saturday, November 21

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Live-in-stock inventory

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Product Details

The COMP Cams 12-477-44 Xtreme Energy hydraulic roller camshaft is engineered for Chevrolet small block engines seeking an aggressive street/strip performance profile. This 4-pattern camshaft delivers excellent mid-range to top-end power with strong throttle response and a noticeable lope at idle.

Camshaft Specifications:

  • Intake Duration: 258° at 0.050" (advertised duration varies by lobe)
  • Exhaust Duration: 268° at 0.050" (advertised duration varies by lobe)
  • Intake Centerline: 260°
  • Exhaust Centerline: 270°
  • Hydraulic roller design for reduced friction and increased durability
  • 4-pattern grind optimizes valve timing for each cylinder
  • Designed specifically for Chevrolet small block V8 engines

Performance Characteristics:

  • Ideal for street/strip applications with 9.5:1 to 10.5:1 compression
  • Strong power range from 1,800 to 6,000 RPM
  • Requires aftermarket valve springs, retainers, and pushrods
  • Compatible with factory fuel injection or carbureted setups
  • Choppy idle with aggressive sound

This camshaft requires hydraulic roller lifters (not included) and proper valvetrain components to handle the increased lift and duration. Professional installation and tuning recommended for optimal performance.

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

Inboard Intake Valve Lift

0.637

Outboard Intake Duration at .050 Inch Lift

260

Outboard Exhaust Duration at .050 inch Lift

270

Grind Number

311QS10

Basic Operating RPM Range

3200-7,500

Advertised Inboard Exhaust Duration

323

Camshaft Series

4-Pattern Small Base Circle

Assembly Lubricant Included

No

Lifters Included

No

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

Outboard Exhaust Valve Lift

0.621

Outboard Intake Valve Lift

0.637

Cam Type

Hydraulic Roller

Camshaft Material

Billet Steel

Usage

Street/Strip

Advertised Inboard Intake Duration

311

Advertised Outboard Exhaust Duration

325

Advertised Outboard Intake Duration

313

AMAZON ASIN

B00CWZUWVI

Inboard Exhaust Duration at .050 inch Lift

268

Inboard Exhaust Valve Lift

0.621

Inboard Intake Duration at .050 Inch Lift

258

Engine Family

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

Fast shipping and great prices will do business again (actually really soon)

Very good.

Great Transaction. Easy to use website. Nice experience. Free candy is nice,, too.

Fast and easy to find my parts and purchase them

The application will work but I have to modify it slightly as the bolt circle in a little undersized for my application.

Best prices online! Ordered a JBA performance exhaust and Airaid intake system for my 06 F-150. Was hesitant at first because I never heard of them but ordering was a breeze and saved me over $100 total for two items compared to anywhere else. Had package at my door in about 24 hours and even selected normal UPS ground shipping. Very satisfied and will definitely return!

Good Website. User Friendly. Able to quickly find and determine if part would fit my car. Like the pricing and shipping options (unlike some others that only offer ground shipping)

Another order for a toolbox! Great service swheet price!

Had the part I needed at a reasonable price. Speedy shipping.

Everything was quick and easy. It was the cheapest price I could find AND I was able to pay with PayPal. Very nice.

Excellent prices, inventory and fast service. I placed my order on Saturday, Aug 4, it was shipped on Monday, Aug 6, and due to arrive on Friday. I will be a repeat customer with prices and service like this.

....

Fast service and great prices. knowledgable sales persons, Hugh in stock items. Packing was excellent, doubled boxed.

Easy to use site and good prices. Will follow up with shipping and product experience. - Shipping was reasonable and items/packaging in good order. Great pricing.

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