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COMP Cams 11-677-20 Xtreme Energy 236/242 Solid Flat Tappet Camshaft Chevy BBC 396-454

(Chevrolet Camaro 1967-72, Corvette 1965-74, Impala 1965-76, Malibu 1966-67, 1973-75, C1500 1990-93, Chevelle 1965-73, Blazer 1973-74 + 105 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

11-677-20
9 reviews
Sale Price

$422.95

Estimated ship date Tuesday, November 24

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Product Details

The COMP Cams Xtreme Energy 11-677-20 is a high-performance solid flat tappet camshaft designed specifically for Chevrolet Big Block engines ranging from 396 to 454 cubic inches. This camshaft delivers aggressive street and strip performance with its 236/242-degree advertised duration specifications, providing excellent mid-range to top-end power gains while maintaining acceptable idle quality.

Camshaft Specifications:

  • Advertised Duration: 236° Intake / 242° Exhaust
  • Duration at .050": 286° Intake / 292° Exhaust
  • Valve Lift: .512" Intake / .519" Exhaust (with 1.7:1 rocker ratio)
  • Lobe Separation Angle: 110°
  • Type: Solid Flat Tappet
  • RPM Range: 2,500-6,500

Key Features:

  • Xtreme Energy lobe profiles provide maximum performance while maintaining durability
  • Ideal for street/strip applications with manual or automatic transmissions
  • Requires aftermarket valve springs and solid lifters (not included)
  • Designed for engines with aftermarket cylinder heads and increased compression
  • Produces aggressive performance with noticeably lopey idle

This camshaft is best suited for performance-oriented builds with supporting modifications including headers, intake manifold, carburetor, and higher-than-stock compression ratios. Professional installation and proper break-in procedures are strongly recommended for all solid flat tappet camshafts to ensure longevity and optimal performance.

Products specifications

Fits

Chevrolet Camaro 1967-72, Corvette 1965-74, Impala 1965-76, Malibu 1966-67, 1973-75, C1500 1990-93, Chevelle 1965-73, Blazer 1973-74, C10 Pickup 1968-80, Caprice 1966-76, C10 1975-81, El Camino 1967-75, Monte Carlo 1970-75 + 100 more models

Advertised Exhaust Duration

280

Grind Number

XS274S

Lifter Type

Solid Flat Tappet

Intake Valve Lift

0.568

Exhaust Valve Lift

0.578

Camshaft Material

Nitrided Cast Iron

Cam Type

Solid Flat Tappet

Assembly Lubricant Included

Yes

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.

Advertised Intake Duration

274

Basic Operating RPM Range

2,000-6,400

Camshaft Gear Attachment

3-Bolt

Exhaust Duration at .050 inch Lift

242

Intake Duration at .050 Inch Lift

236

Usage

Street/Strip

AMAZON ASIN

B002EE0DGQ

Engine Family

Chevrolet 396-454 c.i. 8 Cylinder (1967-1996)

Camshaft Series

Xtreme Energy

Shipping looks to be fairly quick. I'm satisfied so far. I am now waiting for delivery and hope it is as smooth as process as the purchase.

first time ive order from here and my experience was great! shipping was crazy fast. and they had the best price shipped on the 2jz arp head stud set i could find. also how on their site they actually list if they have the part in stock and how many which is very helpful. ive payed for parts to find out the vender didn't even have them available. which lead to more down time. and we all hate down time :)

I ordered an Optima battery for my truck after I did a Google search for the battery. Autoplicity was the cheapest on the Web. Even cheaper then eBay. They got me hooked. Thanks Autoplicity

Best price on the internet. A lot cheaper than amazon, so I was pretty surprised.

This is the first time I've ordered from Autoplicity. I found they had the best price on the item I was looking for and decided to try them. I ordered this item yesterday(Sunday) and was just informed that it shipped. That is quick. I am pleased with their customer service and will use them as my first source.

Ordered a CTEK charger. Great price, and recieved it in 3 days. Very pleased.

Thank you

I ordered a Flowmaster cat back system for my 2012 F-150. The order arrived the day they said it would and the product came at a fair price. Well done.

Excellent customer service. Treated me very well. Issued a refund, no problem. Thank you!!

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