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COMP Cams Camshaft CB XM 270HR-12

SKU: CCA11-445-8

Camshafts

CCA Camshafts...

COMP Cams Camshaft CB XM 270HR-12

SKU: CCA11-445-8

Camshafts

CCA Camshafts...

A$1,184.81
IN STOCK! Est Ship 4-7 days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.
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Description

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.

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

Product Details

Advertised Exhaust Duration:276
Advertised Intake Duration:270
Amazon ASIN:B000P592UE
Assembly Lubricant Included:No
Basic Operating RPM Range:1,600-5,400
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 Roller
Cam and Lifter Kit Upgrade:CL11-445-8
Camshaft Gear Attachment:3-Bolt
Camshaft Material:Austempered Ductile Iron
Camshaft Series:Xtreme Marine
Description:Xtreme Marine 218/224 Hydraulic Roller Cam for Chevrolet Big Block 396-454
Engine Family:Chevrolet 396-454 c.i. 8 Cylinder (1967-1996)
Exhaust Duration @ .050 in.:224
Exhaust Duration at .050 inch Lift:224
Exhaust Duration:276
Exhaust Valve Lift(in):0.51
Exhaust Valve Lift:0.51
Grind Number:XM270HR
Intake Duration @ .050 in.:218
Intake Duration at .050 Inch Lift:218
Intake Duration:270
Intake Valve Lift(in):0.510
Intake Valve Lift:0.51
K-Kit Upgrade:K11-445-8
Lifter Type:Hydraulic Roller
Lifters Included:No
Lobe Separation:112
Part Number:cca11-445-8
RPM Range:1000-7000
SK-Kit Upgrade:SK11-445-8
Title:Xtreme Marine 218/224 Hydraulic Roller 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 17:49:25

Specifications

Product Attributes - Brand
COMP Cams
Product Attributes - Manufacturer's Part Number
11-445-8
Product Attributes - Part Type
Camshafts
Product Attributes - Product Line
COMP Cams Xtreme Marine Camshafts
Product Attributes - UPC
036584038528
Product Attributes - Cam Style
Hydraulic roller, Retro-fit
Product Attributes - Camshaft Use
Marine
Product Attributes - Basic Operating RPM Range
1,600-5,400
Product Attributes - Intake Duration at 050 inch Lift
218
Product Attributes - Exhaust Duration at 050 inch Lift
224
Product Attributes - Duration at 050 inch Lift
218 int./224 exh.
Product Attributes - Advertised Intake Duration
270
Product Attributes - Advertised Exhaust Duration
276
Product Attributes - Advertised Duration
270 int./276 exh.
Product Attributes - Intake Valve Lift with Factory Rocker Arm Ratio
0.510 in.
Product Attributes - Exhaust Valve Lift with Factory Rocker Arm Ratio
0.510 in.
Product Attributes - Valve Lift with Factory Rocker Arm Ratio
0.510 int./0.510 exh.
Product Attributes - Lobe Separation (degrees)
112
Product Attributes - Remanufactured
No
Product Attributes - Computer-Controlled Compatible
No
Product Attributes - Grind Number
CB XM 270HR-12
Product Attributes - Valve Springs Required
Yes
Product Attributes - Quantity
Sold individually.

Reference Information

Brand Name/s Comp Cams
StreetFX SKU cca11-445-8
SFX Item ID 4118450
Supplier Item Code 4118450
Manufacturer SKU 11-445-8
Manufacturer UPC 36584038528
Alternative References c10, s10, COM11-445-8, 270HR-12

Compatibility

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

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