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COMP Cams Camshaft CS 274L312 S7

SKU: CCA12-683-5

Camshafts

CCA Camshafts...

COMP Cams Camshaft CS 274L312 S7

SKU: CCA12-683-5

Camshafts

CCA Camshafts...

Sale ends in Calculating...

A$721.91 A$810.33
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

Exclusive Comp Cams flash sale discount at StreetFX!

Talk about timing! This is a limited offer while stocks last on various Comp Cams part numbers. There's never been a better time to buy your Comp Cams upgrades, so what are you waiting for?!

This item is currently on sale!

Same-day payment required to secure promotional price. Promotions may end early or be extended based on stock levels or other factors.

Lnchr 248/252 SFTSBC

SBC - 1955-57 models have an oiling groove in the rear journal. The listed part numbered cams will not fit these models, so if you require a Camshaft with the oiling groove, please call us at 1-800-999-0853 or contact us, and we will assist you with placing an order.

Additional Information

.312" lobe lift - Good for higher RPM tracks restricted with .480" or .500" lift rule.

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; 3200-6800rpm; Adv. Dur. 274 Int./278 Exh.; Valve Lift .468 Int/Exh.; Lobe Angle 107 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/ M Engine VIN;
• w/ M Engine VIN; Not Legal For Sale Or Use On Pollution-Controlled Motor Vehicle Mech. Flat Tappet; 3200-6800rpm; Adv. Dur. 274 Int./278 Exh.; Valve Lift .468 Int/Exh.; Lobe Angle 107 deg.;

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: 2026-11-09 19:33:15

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:278
Advertised Intake Duration:274
Amazon ASIN:B000P5DBBA
Assembly Lubricant Included:Yes
Basic Operating RPM Range:3200-6,800
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:Launcher Series
Description:Launcher Series 248/252 Solid Flat Cam for Chevrolet Small Block
Engine Family:Chevrolet 262-400 c.i. 8 Cylinder (1958-1998)
Exhaust Duration @ .050 in.:252
Exhaust Duration at .050 inch Lift:252
Exhaust Duration:278
Exhaust Valve Lift(in):0.468
Exhaust Valve Lift:0.468
Grind Number:LB2745
Intake Duration @ .050 in.:248
Intake Duration at .050 Inch Lift:248
Intake Duration:274
Intake Valve Lift(in):0.468
Intake Valve Lift:0.468
Lifter Type:Solid Flat Tappet
Lifters Included:No
Part Number:cca12-683-5
RPM Range:3000-9000
Title:Launcher Series 248/252 Solid Flat Cam for Chevrolet Small Block
Usage:Street/Strip
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 19:01:15

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Comp Cams, Comp Cams (edelbrock)
StreetFX SKU cca12-683-5
SFX Item ID 4118803
Accounting SKU cca-12-683-5
Manufacturer SKU 12-683-5
Manufacturer UPC 036584070504
Alternative References 12-683-5, CCA-12-683-5

Camshaft, Mechanical Flat Tappet, Advertised Duration 274/278, Lift .468/.468, Chevy, Small Block, Each

COMP Cams oval track camshafts are designed specifically for racing applications. They are available to complement a variety of engine configurations, track lengths, and conditions--simply order the model that fits the needs of your particular make and model. Before you start the next oval track race, install the winning camshaft edge from COMP Cams.

Product Attributes
BrandCOMP Cams
Manufacturer's Part Number12-683-5
Part TypeCamshafts
Product LineCOMP Cams Oval Track Camshafts
UPC036584070504
Cam StyleSolid flat tappet
Camshaft UseStreet/Strip
Basic Operating RPM Range3,200-6,800
Intake Duration at 050 inch Lift248
Exhaust Duration at 050 inch Lift252
Duration at 050 inch Lift248 int./252 exh.
Advertised Intake Duration274
Advertised Exhaust Duration278
Advertised Duration274 int./278 exh.
Intake Valve Lift with Factory Rocker Arm Ratio0.468 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio0.468 in.
Valve Lift with Factory Rocker Arm Ratio0.468 int./0.468 exh.
Intake Valve Lash0.014 in.
Exhaust Valve Lash0.014 in.
RemanufacturedNo
Computer-Controlled CompatibleNo
Grind NumberCS 274L312 S7
Valve Springs RequiredYes
QuantitySold individually.

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