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COMP Cams Camshaft Kit CS XM 290H-12

SKU: CCASK12-248-4

Camshaft Kits

CCA Camshaft Kits...

COMP Cams Camshaft Kit CS XM 290H-12

SKU: CCASK12-248-4

Camshaft Kits

CCA Camshaft Kits...

A$1,006.28
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

XM 246/256 HFTSK SBC

SK-KIT - Small Kit Includes: Camshaft, Lifters, Timing Chain Set, Assembly Lube, Decals and Instructions.

Additional Information

Jet boat with A impeller, 9.5:1 compression, needs headers. Good for bracket racing and high performance.

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 21:15:55

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:306
Advertised Intake Duration:290
Amazon ASIN:B001GF3NF2
Assembly Lubricant Included:Yes
Basic Operating RPM Range:2,500-6,500
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 246/256 Hydraulic Flat Cam SK-Kit for Chevrolet Small Block
Engine Family:Chevrolet 262-400 c.i. 8 Cylinder (1958-1998)
Exhaust Duration @ .050 in.:256
Exhaust Duration at .050 inch Lift:256
Exhaust Duration:306
Exhaust Valve Lift(in):0.522
Exhaust Valve Lift:0.522
Gaskets Included:No
Intake Duration @ .050 in.:246
Intake Duration at .050 Inch Lift:246
Intake Duration:290
Intake Valve Lift(in):0.516
Intake Valve Lift:0.516
Kit Type:SK-Kit - Small Kit
Lifter Type:Hydraulic Flat Tappet
Lifters Included:Yes
Locks Included:No
Part Number:ccaSK12-248-4
Pushrods Included:No
RPM Range:2000-9000
Retainers Included:No
Timing Chain and Gears Included:Yes
Title:Xtreme Marine 246/256 Hydraulic Flat Cam SK-Kit for Chevrolet Small Block
Usage:Marine
Valve Springs Required:Yes
Valve Stem Seals Included:No

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 19:11:41

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Comp Cams, Comp Cams (edelbrock)
StreetFX SKU ccaSK12-248-4
SFX Item ID 4124421
Accounting SKU cca-SK12-248-4
Manufacturer SKU SK12-248-4
Manufacturer UPC 036584041535
Alternative References CCA-SK12-248-4, SK12-248-4

Camshaft Kits, Xtreme Marine Cam and Lifter Kits, Hydraulic Flat Tappet, Advertised Duration 290/306, Lift 0.516/0.522, Chevy, GMC, 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 NumberSK12-248-4
Part TypeCamshaft Kits
Product LineCOMP Cams Xtreme Marine Cam and Lifter Kits
UPC036584041535
Cam StyleHydraulic flat tappet
Basic Operating RPM Range2,500-6,500
Camshaft UseMarine
Camshaft Manufacturers DescriptionJet boat with A impeller, 9.5:1 compression, needs headers. Good for bracket racing and high performance.
Intake Duration at 050 inch Lift246
Exhaust Duration at 050 inch Lift256
Duration at 050 inch Lift246 int./256 exh.
Advertised Intake Duration290
Advertised Exhaust Duration306
Advertised Duration290 int./306 exh.
Intake Valve Lift with Factory Rocker Arm Ratio0.516 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio0.522 in.
Valve Lift with Factory Rocker Arm Ratio0.516 int./0.522 exh.
Camshaft Gear Attachment3-bolt
Computer-Controlled CompatibleNo
Lifters IncludedYes
Lifter StyleHydraulic flat tappet
Valve Springs IncludedNo
Retainers IncludedNo
Locks IncludedNo
Valve Stem Seals IncludedNo
Timing Chain and Gears IncludedYes
Assembly Lubricant IncludedYes
Pushrods IncludedNo
Rocker Arms IncludedNo
Gaskets IncludedNo
Valve Springs RequiredYes
QuantitySold as a kit.

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