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COMP Cams Camshaft CS XS274S-10

SKU: CCA12-677-4

Camshafts

CCA Camshafts...

COMP Cams Camshaft CS XS274S-10

SKU: CCA12-677-4

Camshafts

CCA Camshafts...

A$693.77
Available from MFR. This item is available from the manufacturer's distribution centre. The dispatch timeframe shown is an estimate based on historical order processing and release times for this part. This item is not held in our own warehouse, and actual dispatch timing may vary depending on manufacturer workload and logistics at the time of ordering.
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Description

Featuring a quicker valve opening, the Xtreme Energy camshaft profile provides increased responsiveness and more area under the lift curve than older, slower grinds. Designed to increase performance without sacrificing driveability and creature comforts, the Xtreme Energy grind family offers gains in torque and horsepower while still delivering adequate vacuum for power brakes and other vacuum dependent accessories. Xtreme Energy camshafts work great in carbureted applications, but offer the best performance with aftermarket intake manifolds, lower gear ratios, headers and free flowing exhaust.

Product Overview

Fits Chevrolet GEN 1 Small Blocks including the 262, 265, 267, 283, 302, 305, 307, 327, 350 and 400. Does not fit LT1/LT4, or factory roller Small Blocks built from 1985 and newer. GM gradually added roller camshafts to 305's and 350's from the mid 80's forward. Camaros/Firebirds/Corvettes received the roller cams early, but many trucks and SUV's had flat tappet cams until the mid 90's. Remove the intake or timing cover to confirm whether the block is a factory roller or flat tappet. Does not fit the LS1, LS2, LS3 or any LS-based 4.8, 5.3, 5.7, 6.0 and 6.2. 1955-1957 Chevrolet 265 engines require a groove on the 5th cam journal for oiling. Contact us for more information.

Product Details

Advertised Exhaust Duration:280
Advertised Intake Duration:274
Amazon ASIN:B001NN90FO
Assembly Lubricant Included:Yes
Basic Operating RPM Range:2,000-6,400
C.A.R.B. E.O. Number:N/A
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.
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. Exemption Reason:N/A
California Proposition 65:WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov
Cam Type:Solid Flat Tappet
Cam and Lifter Kit Upgrade:CL12-677-4
Camshaft Gear Attachment:3-Bolt
Camshaft Material:Cast Iron
Camshaft Series:Xtreme Energy
Description:Xtreme Energy 236/242 Solid Flat Cam for Chevrolet Small Block
Engine Family:Chevrolet 262-400 c.i. 8 Cylinder (1958-1998)
Exhaust Duration @ .050 in.:242
Exhaust Duration at .050 inch Lift:242
Exhaust Duration:280
Exhaust Valve Lift(in):0.51
Exhaust Valve Lift:0.51
Grind Number:XS274S
Intake Duration @ .050 in.:236
Intake Duration at .050 Inch Lift:236
Intake Duration:274
Intake Valve Lift(in):0.501
Intake Valve Lift:0.501
K-Kit Upgrade:K12-677-4
Lifter Type:Solid Flat Tappet
Lifters Included:No
Lobe Separation:110
Part Number:cca12-677-4
RPM Range:2000-9000
SK-Kit Upgrade:SK12-677-4
Title:Xtreme Energy 236/242 Solid Flat Cam for Chevrolet Small Block
Usage:Street/Performance
Valve Springs Required:Yes

Application Summary

Fits Chevrolet GEN 1 Small Blocks including the 262, 265, 267, 283, 302, 305, 307, 327, 350 and 400. Does not fit LT1/LT4, or factory roller Small Blocks built from 1985 and newer. GM gradually added roller camshafts to 305's and 350's from the mid 80's forward. Camaros/Firebirds/Corvettes received the roller cams early, but many trucks and SUV's had flat tappet cams until the mid 90's. Remove the intake or timing cover to confirm whether the block is a factory roller or flat tappet. Does not fit the LS1, LS2, LS3 or any LS-based 4.8, 5.3, 5.7, 6.0 and 6.2. 1955-1957 Chevrolet 265 engines require a groove on the 5th cam journal for oiling. Contact us for more information.

Part Type

Engine Camshaft

Data: v4.2 - Upd: 2026-10-17 21:34:23

Specifications

Product Attributes - Brand
COMP Cams
Product Attributes - Manufacturer's Part Number
12-677-4
Product Attributes - Part Type
Camshafts
Product Attributes - Product Line
COMP Cams Xtreme Energy Camshafts
Product Attributes - UPC
036584070252
Product Attributes - Cam Style
Solid flat tappet
Product Attributes - Camshaft Use
Street/Strip
Product Attributes - Basic Operating RPM Range
2,000-6,400
Product Attributes - Intake Duration at 050 inch Lift
236
Product Attributes - Exhaust Duration at 050 inch Lift
242
Product Attributes - Duration at 050 inch Lift
236 int./242 exh.
Product Attributes - Advertised Intake Duration
274
Product Attributes - Advertised Exhaust Duration
280
Product Attributes - Advertised Duration
274 int./280 exh.
Product Attributes - Intake Valve Lift with Factory Rocker Arm Ratio
0.501 in.
Product Attributes - Exhaust Valve Lift with Factory Rocker Arm Ratio
0.510 in.
Product Attributes - Valve Lift with Factory Rocker Arm Ratio
0.501 int./0.510 exh.
Product Attributes - Lobe Separation (degrees)
110
Product Attributes - Intake Valve Lash
0.016 in.
Product Attributes - Exhaust Valve Lash
0.016 in.
Product Attributes - Remanufactured
No
Product Attributes - Computer-Controlled Compatible
No
Product Attributes - Grind Number
CS XS274S-10
Product Attributes - Valve Springs Required
Yes
Product Attributes - Quantity
Sold individually.

Reference Information

Brand Name/s Comp Cams
StreetFX SKU cca12-677-4
SFX Item ID 4118797
Supplier Item Code 4118797
Manufacturer SKU 12-677-4
Manufacturer UPC 36584070252
Alternative References l46, l48, l65, lm1, lt-1, l82

Compatibility

Fits Chevrolet GEN 1 Small Blocks including the 262, 265, 267, 283, 302, 305, 307, 327, 350 and 400. Does not fit LT1/LT4, or factory roller Small Blocks built from 1985 and newer. GM gradually added roller camshafts to 305's and 350's from the mid 80's forward. Camaros/Firebirds/Corvettes received the roller cams early, but many trucks and SUV's had flat tappet cams until the mid 90's. Remove the intake or timing cover to confirm whether the block is a factory roller or flat tappet. Does not fit the LS1, LS2, LS3 or any LS-based 4.8, 5.3, 5.7, 6.0 and 6.2. 1955-1957 Chevrolet 265 engines require a groove on the 5th cam journal for oiling. Contact us for more information.

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