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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
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Description

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 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.

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. 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: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
Lobe Separation:112
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

Application Summary

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

Part Type

Engine Camshaft

Data: v4.2 - Upd: 2026-10-13 17:50:15

Specifications

Product Attributes - Brand
COMP Cams
Product Attributes - Manufacturer's Part Number
11-240-20
Product Attributes - Part Type
Camshafts
Product Attributes - Product Line
COMP Cams Xtreme Marine Camshafts
Product Attributes - UPC
036584177814
Product Attributes - Cam Style
Hydraulic flat tappet
Product Attributes - Camshaft Use
Marine
Product Attributes - Basic Operating RPM Range
2,000-6,200
Product Attributes - Intake Duration at 050 inch Lift
234
Product Attributes - Exhaust Duration at 050 inch Lift
244
Product Attributes - Duration at 050 inch Lift
234 int./244 exh.
Product Attributes - Advertised Intake Duration
278
Product Attributes - Advertised Exhaust Duration
292
Product Attributes - Advertised Duration
278 int./292 exh.
Product Attributes - Intake Valve Lift with Factory Rocker Arm Ratio
0.564 in.
Product Attributes - Exhaust Valve Lift with Factory Rocker Arm Ratio
0.566 in.
Product Attributes - Valve Lift with Factory Rocker Arm Ratio
0.564 int./0.566 exh.
Product Attributes - Lobe Separation (degrees)
112
Product Attributes - Remanufactured
No
Product Attributes - Computer-Controlled Compatible
No
Product Attributes - Grind Number
XM278H
Product Attributes - Valve Springs Required
Yes
Product Attributes - Quantity
Sold individually.
Product Attributes - Notes
Nitrided version camshaft.

Reference Information

Brand Name/s Comp Cams
StreetFX SKU cca11-240-20
SFX Item ID 4118401
Supplier Item Code 4118401
Manufacturer SKU 11-240-20
Manufacturer UPC 36584177814
Alternative References c10, s10, 278H-

Compatibility

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

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