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COMP Cams Camshaft CB XM 270H-12

SKU: CCA11-236-4

Camshafts

CCA Camshafts...

COMP Cams Camshaft CB XM 270H-12

SKU: CCA11-236-4

Camshafts

CCA Camshafts...

A$702.23
Available from MFR. In stock at 2 locations (10 available)

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Description

Camshaft - Xtreme Marine - Hydraulic Flat Tappet - Lift 0.544 / 0.547 in - Duration 270 / 286 - 112 LSA - 1600 / 5800 RPM - Big Block Chevy - Each

XMar 226/236 HFTBBC

BBC - 1965-66 396 c.i.d. models have an oiling groove in the rear journal. The listed part numbered cams will not fit these models, so if you require a Camshaft with the oiling groove, please call us at 1-800-999-0853 or contact us, and we will assist you with placing an order.

Additional Information

Jet w/ A impeller, strong mid- range, good throttle response, noticeable idle.

Application Summary

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

Part Type

Engine Camshaft

Product Overview

*Xtreme Marine Camshafts*
• Extremely wide powerband helps get boat on plane while making maximum horsepower
• Work against exhaust systems with restrictive back pressure
• Power enhancement helps maintain top end speed for long distances
• Intended for applications where low idle speeds are required

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:286
Advertised Intake Duration:270
Amazon ASIN:B000CIS5YI
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
Cam and Lifter Kit Upgrade:CL11-236-4
Camshaft Gear Attachment:3-Bolt
Camshaft Material:Cast Iron
Camshaft Series:Xtreme Marine
Description:Xtreme Marine 226/236 Hydraulic Flat Cam for Chevrolet Big Block 396-454
Engine Family:Chevrolet 396-454 c.i. 8 Cylinder (1967-1996)
Exhaust Duration @ .050 in.:236
Exhaust Duration at .050 inch Lift:236
Exhaust Duration:286
Exhaust Valve Lift(in):0.547
Exhaust Valve Lift:0.547
Grind Number:XM270H
Intake Duration @ .050 in.:226
Intake Duration at .050 Inch Lift:226
Intake Duration:270
Intake Valve Lift(in):0.544
Intake Valve Lift:0.544
K-Kit Upgrade:K11-236-4
Lifter Type:Hydraulic Flat Tappet
Lifters Included:No
Part Number:cca11-236-4
RPM Range:1000-7000
SK-Kit Upgrade:SK11-236-4
Title:Xtreme Marine 226/236 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 cca11-236-4
SFX Item ID 4118398
Accounting SKU cca-11-236-4
Manufacturer SKU 11-236-4
Manufacturer UPC 036584038481
Alternative References 11-236-4, CCA-11-236-4, COM11-236-4

Camshaft, Hydraulic Flat Tappet, Advertised Duration 270/286, Lift .544/.547, 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 Number11-236-4
Part TypeCamshafts
Product LineCOMP Cams Xtreme Marine Camshafts
UPC036584038481
Cam StyleHydraulic flat tappet
Camshaft UseMarine
Basic Operating RPM Range1,600-5,800
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 Ratio0.544 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio0.547 in.
Valve Lift with Factory Rocker Arm Ratio0.544 int./0.547 exh.
RemanufacturedNo
Computer-Controlled CompatibleNo
Grind NumberCB XM 270H-12
Valve Springs RequiredYes
QuantitySold individually.

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