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COMP Cams Camshaft CB XM 296HR-12

SKU: CCA11-456-8

Camshafts

CCA Camshafts...

COMP Cams Camshaft CB XM 296HR-12

SKU: CCA11-456-8

Camshafts

CCA Camshafts...

A$1,174.55
Available from MFR. This item is available from the manufacturer's distribution centre. The dispatch timeframe shown is an estimate based on historical order processing and release times for this part. This item is not held in our own warehouse, and actual dispatch timing may vary depending on manufacturer workload and logistics at the time of ordering.
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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. WARNING: Camshaft Optimized for use with a Melanized or Nitrided distributor Gear. Not compatible with cast or Steel Gears without similar surface treatments. Failure to utilize the proper distributor Gear will void all warranties and/or return policies.

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:302
Advertised Intake Duration:296
Amazon ASIN:B000P5B5K4
Assembly Lubricant Included:No
Basic Operating RPM Range:2,800-6,200
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 Roller
Cam and Lifter Kit Upgrade:CL11-456-8
Camshaft Gear Attachment:3-Bolt
Camshaft Material:Austempered Ductile Iron
Camshaft Series:Xtreme Marine
Description:Xtreme Marine 242/248 Hydraulic Roller Cam for Chevrolet Big Block 396-454
Engine Family:Chevrolet 396-454 c.i. 8 Cylinder (1967-1996)
Exhaust Duration @ .050 in.:248
Exhaust Duration at .050 inch Lift:248
Exhaust Duration:302
Exhaust Valve Lift(in):0.566
Exhaust Valve Lift:0.566
Grind Number:XM296HR
Intake Duration @ .050 in.:242
Intake Duration at .050 Inch Lift:242
Intake Duration:296
Intake Valve Lift(in):0.566
Intake Valve Lift:0.566
K-Kit Upgrade:K11-456-8
Lifter Type:Hydraulic Roller
Lifters Included:No
Lobe Separation:112
Part Number:cca11-456-8
RPM Range:2000-9000
SK-Kit Upgrade:SK11-456-8
Title:Xtreme Marine 242/248 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
11-456-8
Product Attributes - Part Type
Camshafts
Product Attributes - Product Line
COMP Cams Xtreme Marine Camshafts
Product Attributes - UPC
036584038542
Product Attributes - Cam Style
Hydraulic roller, Retro-fit
Product Attributes - Camshaft Use
Marine
Product Attributes - Basic Operating RPM Range
2,800-6,200
Product Attributes - Intake Duration at 050 inch Lift
242
Product Attributes - Exhaust Duration at 050 inch Lift
248
Product Attributes - Duration at 050 inch Lift
242 int./248 exh.
Product Attributes - Advertised Intake Duration
296
Product Attributes - Advertised Exhaust Duration
302
Product Attributes - Advertised Duration
296 int./302 exh.
Product Attributes - Intake Valve Lift with Factory Rocker Arm Ratio
0.566 in.
Product Attributes - Exhaust Valve Lift with Factory Rocker Arm Ratio
0.566 in.
Product Attributes - Valve Lift with Factory Rocker Arm Ratio
0.566 int./0.566 exh.
Product Attributes - Lobe Separation (degrees)
112
Product Attributes - Remanufactured
No
Product Attributes - Computer-Controlled Compatible
No
Product Attributes - Grind Number
CB XM 296HR-12
Product Attributes - Valve Springs Required
Yes
Product Attributes - Quantity
Sold individually.
Product Attributes - Notes
Designed for marine use. Requires thrust button and wear plate.

Reference Information

Brand Name/s Comp Cams
StreetFX SKU cca11-456-8
SFX Item ID 4118453
Supplier Item Code 4118453
Manufacturer SKU 11-456-8
Manufacturer UPC 36584038542
Alternative References c10, s10, COM11-456-8, 296HR-12

Compatibility

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

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