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COMP Cams Camshaft Kit CS XS274S-10

SKU: CCAK12-677-4

Camshaft Kits

CCA Camshaft Kits...

COMP Cams Camshaft Kit CS XS274S-10

SKU: CCAK12-677-4

Camshaft Kits

CCA Camshaft Kits...

A$1,885.18
Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.

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Description

COMP Cams Camshaft Kit CS XS274S-10

K-KIT - Complete Kit Includes: Camshaft, Lifters, Valve Springs, Retainers, Valve Locks, Valve Stem Seals, Timing Chain Set, Assembly Lube (in flat tappet applications), Decals and Instructions.

Additional Information

Very strong mid-range torque and throttle response, 2200+ stall.

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 Kit

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.

Additional Application Notes
• Not Legal For Sale Or Use On Pollution-Controlled Motor Vehicle Mech Flat Tappet; 2000-6400rpm;Adv.Dur. 274 Int./280 Exh.;V.Lift .501 Int./.510 Exh.;Lobe 110 deg;Incl.Cam;Lifter;V.Sprng/Ret./Lock/Seal;Timing Set;
• w/ T Engine VIN;
• w/ T Engine VIN; Not Legal For Sale Or Use On Pollution-Controlled Motor Vehicle Mech Flat Tappet; 2000-6400rpm;Adv.Dur. 274 Int./280 Exh.;V.Lift .501 Int./.510 Exh.;Lobe 110 deg;Incl.Cam;Lifter;V.Sprng/Ret./Lock/Seal;Timing Set;
• w/ H Engine VIN;
• w/ H Engine VIN; Not Legal For Sale Or Use On Pollution-Controlled Motor Vehicle Mech Flat Tappet; 2000-6400rpm;Adv.Dur. 274 Int./280 Exh.;V.Lift .501 Int./.510 Exh.;Lobe 110 deg;Incl.Cam;Lifter;V.Sprng/Ret./Lock/Seal;Timing Set;
• w/ E Engine VIN;
• w/ E Engine VIN; Not Legal For Sale Or Use On Pollution-Controlled Motor Vehicle Mech Flat Tappet; 2000-6400rpm;Adv.Dur. 274 Int./280 Exh.;V.Lift .501 Int./.510 Exh.;Lobe 110 deg;Incl.Cam;Lifter;V.Sprng/Ret./Lock/Seal;Timing Set;
• From 1985-1998 Chevrolet introduced the factory roller Small Block into GM cars and trucks. Verify whether or not your vehicle came with a factory roller camshaft. If your vehicle was equipped with a roller camshaft, look to our camshafts and kits that start with "08-".

These additional application notes are supplied by the manufacturer and collated from multiple year ranges. Not all of these notes may apply to every year or every variant. Please contact a StreetFX agent for clarification if required.

Data: v4.2 - Upd: 2026-11-07 21:16:42

Features

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Specifications

Product Details

Advertised Exhaust Duration:280
Advertised Intake Duration:274
Amazon ASIN:B001R9DTN8
Assembly Lubricant Included:Yes
Basic Operating RPM Range:2,000-6,400
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.
Cam Type:Solid Flat Tappet
Camshaft Gear Attachment:3-Bolt
Camshaft Material:Cast Iron
Camshaft Series:Xtreme Energy
Description:Xtreme Energy 236/242 Solid Flat Cam K-Kit 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
Gaskets Included:No
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
Kit Type:K-Kit - Complete Kit
Lifter Type:Solid Flat Tappet
Lifters Included:Yes
Part Number:ccaK12-677-4
RPM Range:2000-9000
Title:Xtreme Energy 236/242 Solid Flat Cam K-Kit for Chevrolet Small Block
Usage:Street/Performance
Valve Springs Included:Yes

Product Downloads

# Document Type Download
1. Catalog

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Data: v2 - Desc: v4.2 - Upd: 2026-11-07 19:10:21

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Comp Cams, Comp Cams (edelbrock)
StreetFX SKU ccaK12-677-4
SFX Item ID 4123785
Accounting SKU cca-K12-677-4
Manufacturer SKU K12-677-4
Manufacturer UPC 036584079361
Alternative References CCA-K12-677-4, K12-677-4

Cam/Lifter, Valvetrain, Mechanical Flat Tappet, Adv. Duration 274/280, Lift .501/.510, Chevy Small Block, Kit

COMP Cams Xtreme Energy cam and lifter kits are built to take advantage of the latest cam technology and provide maximum performance. Whether your use is off-roading, towing, or street performance, there are Xtreme Energy options available for you. By using an aggressive lobe profile, they provide better throttle response and more top-end horsepower than equivalent kits from other manufacturers, while delivering increased engine vacuum. Order the model designed for your vehicle and engine application.

Product Attributes
BrandCOMP Cams
Manufacturer's Part NumberK12-677-4
Part TypeCamshaft Kits
Product LineCOMP Cams Xtreme Energy Cam and Lifter Kits
UPC036584079361
Cam StyleSolid flat tappet
Basic Operating RPM Range2,000-6,400
Camshaft UseStreet/Strip
Intake Duration at 050 inch Lift236
Exhaust Duration at 050 inch Lift242
Duration at 050 inch Lift236 int./242 exh.
Advertised Intake Duration274
Advertised Exhaust Duration280
Advertised Duration274 int./280 exh.
Intake Valve Lift with Factory Rocker Arm Ratio0.501 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio0.510 in.
Valve Lift with Factory Rocker Arm Ratio0.501 int./0.510 exh.
Intake Valve Lash0.016 in.
Exhaust Valve Lash0.016 in.
Grind NumberCS XS274S-10
Computer-Controlled CompatibleNo
Lifters IncludedYes
Lifter StyleMechanical flat tappet
Valve Springs IncludedYes
Outside Diameter of Outer Spring (in.)1.430 in.
Retainers IncludedYes
Locks IncludedYes
Valve Stem Seals IncludedYes
Timing Chain and Gears IncludedYes
Timing Chain StyleSingle non-roller
Assembly Lubricant IncludedYes
Pushrods IncludedNo
Rocker Arms IncludedNo
Gaskets IncludedNo
Valve Springs RequiredNo
QuantitySold as a kit.

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