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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
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Description

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.

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:286
Advertised Intake Duration:271
Amazon ASIN:B001GF10CA
Assembly Lubricant Included:Yes
Basic Operating RPM Range:1,600-5,800
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: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
Lobe Separation:112
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

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

Data: v4.2 - Upd: 2026-10-13 17:41:06

Specifications

Product Attributes - Brand
COMP Cams
Product Attributes - Manufacturer's Part Number
K12-240-4
Product Attributes - Part Type
Camshaft Kits
Product Attributes - Product Line
COMP Cams Xtreme Marine Cam and Lifter Kits
Product Attributes - UPC
036584041474
Product Attributes - Cam Style
Hydraulic flat tappet
Product Attributes - Basic Operating RPM Range
1,600-5,800
Product Attributes - Camshaft Use
Marine
Product Attributes - Intake Duration at 050 inch Lift
226
Product Attributes - Exhaust Duration at 050 inch Lift
236
Product Attributes - Duration at 050 inch Lift
226 int./236 exh.
Product Attributes - Advertised Intake Duration
270
Product Attributes - Advertised Exhaust Duration
286
Product Attributes - Advertised Duration
270 int./286 exh.
Product Attributes - Intake Valve Lift with Factory Rocker Arm Ratio
0.480 in.
Product Attributes - Exhaust Valve Lift with Factory Rocker Arm Ratio
0.489 in.
Product Attributes - Valve Lift with Factory Rocker Arm Ratio
0.480 int./0.489 exh.
Product Attributes - Lobe Separation (degrees)
112
Product Attributes - Grind Number
XM270H
Product Attributes - Computer-Controlled Compatible
No
Product Attributes - Lifters Included
Yes
Product Attributes - Lifter Style
Hydraulic flat tappet
Product Attributes - Valve Springs Included
Yes
Product Attributes - Outside Diameter of Outer Spring (in.)
1.254 in.
Product Attributes - Retainers Included
Yes
Product Attributes - Locks Included
Yes
Product Attributes - Valve Stem Seals Included
Yes
Product Attributes - Timing Chain and Gears Included
Yes
Product Attributes - Timing Chain Style
Double non-roller
Product Attributes - Assembly Lubricant Included
Yes
Product Attributes - Pushrods Included
No
Product Attributes - Rocker Arms Included
No
Product Attributes - Gaskets Included
No
Product Attributes - Valve Springs Required
No
Product Attributes - Quantity
Sold as a kit.

Reference Information

Brand Name/s Comp Cams
StreetFX SKU ccaK12-240-4
SFX Item ID 4123720
Supplier Item Code 4123720
Manufacturer SKU K12-240-4
Manufacturer UPC 36584041474
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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