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COMP Cams Nitrided Camshaft CB XM 278H-

SKU: CCA11-240-20

Camshafts

CCA Camshafts...

COMP Cams Nitrided Camshaft CB XM 278H-

SKU: CCA11-240-20

Camshafts

CCA Camshafts...

A$931.59
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 234/244 HFTBBC

Additional Information

Jet w/ A impeller, needs improved intake, likes headers. Nitrided.

Application Summary

Chevrolet GEN IV 396-454 Big Block Engines Originally Equipped with Flat Tappet Camshafts

Part Type

Engine Camshaft

Product Overview

*Xtreme Energy Camshafts*
• Quicker opening lobe profiles deliver increased responsiveness & more area under the lift curve
• More vacuum allows an increase in duration for improved performance and assists power brakes
• Excellent performance in street carbureted applications
• Best performance with aftermarket intake manifolds, headers, lower gear ratios, etc.

Data: v4.2 - Upd: 2026-11-07 21:25:51

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:292
Advertised Intake Duration:278
Amazon ASIN:B002EDYMMI
Assembly Lubricant Included:Yes
Basic Operating RPM Range:2,000-6,200
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:Nitrided Cast Iron
Camshaft Series:Xtreme Marine
Description:Xtreme Marine NIT 234/244 Hydraulic Flat Cam for Chevrolet Big Block 396-454
Engine Family:Chevrolet 396-454 c.i. 8 Cylinder (1967-1996)
Exhaust Duration @ .050 in.:244
Exhaust Duration at .050 inch Lift:244
Exhaust Duration:292
Exhaust Valve Lift(in):0.566
Exhaust Valve Lift:0.566
Grind Number:XM278H
Intake Duration @ .050 in.:234
Intake Duration at .050 Inch Lift:234
Intake Duration:278
Intake Valve Lift(in):0.564
Intake Valve Lift:0.564
Lifter Type:Hydraulic Flat Tappet
Lifters Included:No
Part Number:cca11-240-20
RPM Range:2000-7000
Title:Xtreme Marine NIT 234/244 Hydraulic Flat Cam for Chevrolet Big Block 396-454
Usage:Marine
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 19:00:13

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Comp Cams, Comp Cams (edelbrock)
StreetFX SKU cca11-240-20
SFX Item ID 4118401
Accounting SKU cca-11-240-20
Manufacturer SKU 11-240-20
Manufacturer UPC 036584177814
Alternative References 11-240-20, CCA-11-240-20

Camshaft, Hydraulic Flat Tappet, Advertised Duration 278/292, Lift .564/.566, Chevy, Big Block, Each

COMP Cams Xtreme Marine camshafts take advantage of the newest developments in camshaft engineering. Their aggressive lobe design produces better throttle response and top-end horsepower than other cams with the same duration at .050 in., while delivering increased engine vacuum. These cams are available for everything from pleasure boats to race applications, so you can always enjoy Xtreme performance on the water. From hydraulic and mechanical, to flat and roller tappet, COMP Cams offers camshafts for your watercraft dating as far back as the 1950s.

Product Attributes
BrandCOMP Cams
Manufacturer's Part Number11-240-20
Part TypeCamshafts
Product LineCOMP Cams Xtreme Marine Camshafts
UPC036584177814
Cam StyleHydraulic flat tappet
Camshaft UseMarine
Basic Operating RPM Range2,000-6,200
Intake Duration at 050 inch Lift234
Exhaust Duration at 050 inch Lift244
Duration at 050 inch Lift234 int./244 exh.
Advertised Intake Duration278
Advertised Exhaust Duration292
Advertised Duration278 int./292 exh.
Intake Valve Lift with Factory Rocker Arm Ratio0.564 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio0.566 in.
Valve Lift with Factory Rocker Arm Ratio0.564 int./0.566 exh.
RemanufacturedNo
Computer-Controlled CompatibleNo
Grind NumberXM278H
Valve Springs RequiredYes
QuantitySold individually.
NotesNitrided version camshaft.

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