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COMP Cams Camshaft Kit CS XM 270H-12

SKU: CCAK12-240-4

Camshaft Kits

CCA Camshaft Kits...

COMP Cams Camshaft Kit CS XM 270H-12

SKU: CCAK12-240-4

Camshaft Kits

CCA Camshaft Kits...

A$1,382.85
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 XM 270H-12

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

Jet boat with A impeller, strong mid-range, good throttle response, noticeable 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 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.

Data: v4.2 - Upd: 2026-11-07 21:17:23

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:286
Advertised Intake Duration:271
Amazon ASIN:B001GF10CA
Assembly Lubricant Included:Yes
Basic Operating RPM Range:1,600-5,800
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:Hydraulic Flat Tappet
Camshaft Gear Attachment:3-Bolt
Camshaft Material:Cast Iron
Camshaft Series:Xtreme Marine
Description:Xtreme Marine 226/236 Hydraulic Flat Cam K-Kit for Chevrolet Small Block
Engine Family:Chevrolet 262-400 c.i. 8 Cylinder (1958-1998)
Exhaust Duration @ .050 in.:236
Exhaust Duration at .050 inch Lift:236
Exhaust Duration:286
Exhaust Valve Lift(in):0.489
Exhaust Valve Lift:0.489
Gaskets Included:No
Intake Duration @ .050 in.:226
Intake Duration at .050 Inch Lift:226
Intake Duration:271
Intake Valve Lift(in):0.480
Intake Valve Lift:0.48
Kit Type:K-Kit - Complete Kit
Lifter Type:Hydraulic Flat Tappet
Lifters Included:Yes
Part Number:ccaK12-240-4
RPM Range:1000-7000
Title:Xtreme Marine 226/236 Hydraulic Flat Cam K-Kit for Chevrolet Small Block
Usage:Marine
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 19:10:09

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Comp Cams, Comp Cams (edelbrock)
StreetFX SKU ccaK12-240-4
SFX Item ID 4123720
Accounting SKU cca-K12-240-4
Manufacturer SKU K12-240-4
Manufacturer UPC 036584041474
Alternative References CCA-K12-240-4, K12-240-4

Cam, Lifters, Valvetrain, Hydraulic Flat Tappet, Duration 270/286, Lift .480/.489, Chevy, Small Block, Kit

COMP Cams Xtreme marine cam and lifter kits take advantage of the newest developments in camshaft design. Their aggressive lobe design produces better throttle response and top-end horsepower than other systems with the same duration at .050 in., while delivering increased engine vacuum. These kits are available for everything from pleasure boats to race applications, so you can always have Xtreme performance on the water.

Product Attributes
BrandCOMP Cams
Manufacturer's Part NumberK12-240-4
Part TypeCamshaft Kits
Product LineCOMP Cams Xtreme Marine Cam and Lifter Kits
UPC036584041474
Cam StyleHydraulic flat tappet
Basic Operating RPM Range1,600-5,800
Camshaft UseMarine
Intake Duration at 050 inch Lift226
Exhaust Duration at 050 inch Lift236
Duration at 050 inch Lift226 int./236 exh.
Advertised Intake Duration270
Advertised Exhaust Duration286
Advertised Duration270 int./286 exh.
Intake Valve Lift with Factory Rocker Arm Ratio0.480 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio0.489 in.
Valve Lift with Factory Rocker Arm Ratio0.480 int./0.489 exh.
Grind NumberXM270H
Computer-Controlled CompatibleNo
Lifters IncludedYes
Lifter StyleHydraulic flat tappet
Valve Springs IncludedYes
Outside Diameter of Outer Spring (in.)1.254 in.
Retainers IncludedYes
Locks IncludedYes
Valve Stem Seals IncludedYes
Timing Chain and Gears IncludedYes
Timing Chain StyleDouble non-roller
Assembly Lubricant IncludedYes
Pushrods IncludedNo
Rocker Arms IncludedNo
Gaskets IncludedNo
Valve Springs RequiredNo
QuantitySold as a kit.

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