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COMP Cams Camshaft CS XS256S-10

SKU: CCA12-674-4

Camshafts

CCA Camshafts...

COMP Cams Camshaft CS XS256S-10

SKU: CCA12-674-4

Camshafts

CCA Camshafts...

A$702.12
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

XE 218/224 SFT SBC

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.

Additional Information

Strong torque thru low end and mid-range, good idle.

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

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; 1000-5600rpm; Adv. Dur. 256 Int./262 Exh.; Valve Lift .465 Int./.477 Exh.; Lobe Angle 110 deg.;
• w/ K Engine VIN;
• w/ K Engine VIN; Not Legal For Sale Or Use On Pollution-Controlled Motor Vehicle Mech. Flat Tappet; 1000-5600rpm; Adv. Dur. 256 Int./262 Exh.; Valve Lift .465 Int./.477 Exh.; Lobe Angle 110 deg.;
• w/ V Engine VIN;
• w/ V Engine VIN; Not Legal For Sale Or Use On Pollution-Controlled Motor Vehicle Mech. Flat Tappet; 1000-5600rpm; Adv. Dur. 256 Int./262 Exh.; Valve Lift .465 Int./.477 Exh.; Lobe Angle 110 deg.;
• w/ L Engine VIN;
• w/ L Engine VIN; Not Legal For Sale Or Use On Pollution-Controlled Motor Vehicle Mech. Flat Tappet; 1000-5600rpm; Adv. Dur. 256 Int./262 Exh.; Valve Lift .465 Int./.477 Exh.; Lobe Angle 110 deg.;
• w/ J Engine VIN;
• w/ J Engine VIN; Not Legal For Sale Or Use On Pollution-Controlled Motor Vehicle Mech. Flat Tappet; 1000-5600rpm; Adv. Dur. 256 Int./262 Exh.; Valve Lift .465 Int./.477 Exh.; Lobe Angle 110 deg.;
• 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-".
• w/ 6 Engine VIN; Not Legal For Sale Or Use On Pollution-Controlled Motor Vehicle Mech. Flat Tappet; 1000-5600rpm; Adv. Dur. 256 Int./262 Exh.; Valve Lift .465 Int./.477 Exh.; Lobe Angle 110 deg.;
• w/ 6 Engine VIN;
• w/ 6 Engine VIN; 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-".
• w/ H Engine VIN;
• w/ H Engine VIN; Not Legal For Sale Or Use On Pollution-Controlled Motor Vehicle Mech. Flat Tappet; 1000-5600rpm; Adv. Dur. 256 Int./262 Exh.; Valve Lift .465 Int./.477 Exh.; Lobe Angle 110 deg.;
• w/ R Engine VIN; Not Legal For Sale Or Use On Pollution-Controlled Motor Vehicle Mech. Flat Tappet; 1000-5600rpm; Adv. Dur. 256 Int./262 Exh.; Valve Lift .465 Int./.477 Exh.; Lobe Angle 110 deg.;
• w/ R Engine VIN;
• w/ X Engine VIN;
• w/ X Engine VIN; Not Legal For Sale Or Use On Pollution-Controlled Motor Vehicle Mech. Flat Tappet; 1000-5600rpm; Adv. Dur. 256 Int./262 Exh.; Valve Lift .465 Int./.477 Exh.; Lobe Angle 110 deg.;
• w/ L Engine VIN; w/ K Engine VIN;
• w/ L Engine VIN; w/ K Engine VIN; Not Legal For Sale Or Use On Pollution-Controlled Motor Vehicle Mech. Flat Tappet; 1000-5600rpm; Adv. Dur. 256 Int./262 Exh.; Valve Lift .465 Int./.477 Exh.; Lobe Angle 110 deg.;
• w/ Y Engine VIN;
• w/ Y Engine VIN; Not Legal For Sale Or Use On Pollution-Controlled Motor Vehicle Mech. Flat Tappet; 1000-5600rpm; Adv. Dur. 256 Int./262 Exh.; Valve Lift .465 Int./.477 Exh.; Lobe Angle 110 deg.;
• w/ M Engine VIN;

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: 2026-11-08 18:37:02

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:262
Advertised Intake Duration:256
Amazon ASIN:B000P5G6DA
Assembly Lubricant Included:Yes
Basic Operating RPM Range:1,000-5,600
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
Cam and Lifter Kit Upgrade:CL12-674-4
Camshaft Gear Attachment:3-Bolt
Camshaft Material:Cast Iron
Camshaft Series:Xtreme Energy
Description:Xtreme Energy 218/224 Solid Flat Cam for Chevrolet Small Block
Engine Family:Chevrolet 262-400 c.i. 8 Cylinder (1958-1998)
Exhaust Duration @ .050 in.:224
Exhaust Duration at .050 inch Lift:224
Exhaust Duration:262
Exhaust Valve Lift(in):0.477
Exhaust Valve Lift:0.477
Grind Number:XS256S
Intake Duration @ .050 in.:218
Intake Duration at .050 Inch Lift:218
Intake Duration:256
Intake Valve Lift(in):0.465
Intake Valve Lift:0.465
K-Kit Upgrade:K12-674-4
Lifter Type:Solid Flat Tappet
Lifters Included:No
Part Number:cca12-674-4
RPM Range:1000-7000
SK-Kit Upgrade:SK12-674-4
Title:Xtreme Energy 218/224 Solid Flat Cam for Chevrolet Small Block
Usage:Street/Performance
Valve Springs Required: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 19:01:13

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Comp Cams, Comp Cams (edelbrock)
StreetFX SKU cca12-674-4
SFX Item ID 4118794
Accounting SKU cca-12-674-4
Manufacturer SKU 12-674-4
Manufacturer UPC 036584070221
Alternative References 12-674-4, CCA-12-674-4

Camshaft, Mechanical Flat Tappet, Advertised Duration 256/252, Lift .465/.477, Chevy, Small Block, Each

COMP Cams Xtreme Energy camshafts employ the latest cam technology to provide maximum performance. Whether your use is off-roading, towing, or street performance, there's an Xtreme Energy cam available for you. By using an aggressive lobe profile, these cams provide better throttle response and more top-end horsepower than equivalent cams from other manufacturers—while delivering increased engine vacuum. Hundreds of models are available for fitment on vehicles from 1955 to the present. Select the cam designed for your application.

Product Attributes
BrandCOMP Cams
Manufacturer's Part Number12-674-4
Part TypeCamshafts
Product LineCOMP Cams Xtreme Energy Camshafts
UPC036584070221
Cam StyleSolid flat tappet
Camshaft UseStreet/Strip
Basic Operating RPM Range1,000-5,600
Intake Duration at 050 inch Lift218
Exhaust Duration at 050 inch Lift224
Duration at 050 inch Lift218 int./224 exh.
Advertised Intake Duration256
Advertised Exhaust Duration262
Advertised Duration256 int./262 exh.
Intake Valve Lift with Factory Rocker Arm Ratio0.465 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio0.477 in.
Valve Lift with Factory Rocker Arm Ratio0.465 int./0.477 exh.
Intake Valve Lash0.016 in.
Exhaust Valve Lash0.016 in.
RemanufacturedNo
Computer-Controlled CompatibleNo
Grind NumberCS XS256S-10
Valve Springs RequiredYes
QuantitySold individually.

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