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COMP Cams Camshaft Kit CB XR284H-R12

SKU: CCAK11-451-8

Camshaft Kits

CCA Camshaft Kits...

COMP Cams Camshaft Kit CB XR284H-R12

SKU: CCAK11-451-8

Camshaft Kits

CCA Camshaft Kits...

A$3,453.20
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

COMP Cams Camshaft Kit CB XR284H-R12

K-KIT - Complete Kit Includes: Camshaft, Lifters, Valve Springs, Retainers, Valve Locks, Valve Stem Seals, Timing Chain Set, Assembly Lube (in flat tappet applications), Decals and Instructions.

Additional Information

Good for jet boat with A impeller. Great for pleasure or mild performance use.

Application Summary

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

Part Type

Engine Camshaft Kit

Product Overview

COMP Cams offers complete component-matched valve train kits that deliver unbeatable performance, durability and ease of installation.

All cam kits are fully tested and manufactured to the strictest standards. Each kit's components were specifically chosen as the best performance match for that particular camshaft so that you can reap the benefits of a perfectly matched “Power Engineered System.”

*K-Kit - Complete Kit Includes*
• Camshaft
• Lifters
• Valve Springs
• Retainers
• Valve Locks
• Valve Stem Seals
• Assembly Lube
• Decals
• Instructions

Data: v4.2 - Upd: 2026-11-07 21:17:25

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:290
Advertised Intake Duration:284
Amazon ASIN:B001GEV3VY
Assembly Lubricant Included:No
Basic Operating RPM Range:2,200-5,800
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 Roller
Camshaft Gear Attachment:3-Bolt
Camshaft Material:Austempered Ductile Iron
Camshaft Series:Xtreme Marine
Description:Xtreme Marine 230/236 Hydraulic Roller Cam K-Kit 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:290
Exhaust Valve Lift(in):0.547
Exhaust Valve Lift:0.547
Gaskets Included:No
Intake Duration @ .050 in.:230
Intake Duration at .050 Inch Lift:230
Intake Duration:284
Intake Valve Lift(in):0.547
Intake Valve Lift:0.547
Kit Type:K-Kit - Complete Kit
Lifter Type:Hydraulic Roller
Lifters Included:Yes
Part Number:ccaK11-451-8
RPM Range:2000-9000
Title:Xtreme Marine 230/236 Hydraulic Roller Cam K-Kit for Chevrolet Big Block 396-454
Usage:Marine
Valve Springs Included: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 19:09:57

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Comp Cams, Comp Cams (edelbrock)
StreetFX SKU ccaK11-451-8
SFX Item ID 4123657
Accounting SKU cca-K11-451-8
Manufacturer SKU K11-451-8
Manufacturer UPC 036584040712
Alternative References CCA-K11-451-8, K11-451-8

Cam, Lifters, Valvetrain, Hydraulic Roller Tappet, Advertised Duration 284/290, Lift .547/.547, Chevy, 396-454

COMP Cams Xtreme marine cam and lifter kits take advantage of the newest developments in camshaft design. Their aggressive lobe design produces better throttle response and top-end horsepower than other systems with the same duration at .050 in., while delivering increased engine vacuum. These kits are available for everything from pleasure boats to race applications, so you can always have Xtreme performance on the water.

Product Attributes
BrandCOMP Cams
Manufacturer's Part NumberK11-451-8
Part TypeCamshaft Kits
Product LineCOMP Cams Xtreme Marine Cam and Lifter Kits
UPC036584040712
Cam StyleHydraulic roller, Retro-fit
Basic Operating RPM Range2,200-5,800
Camshaft UseMarine
Intake Duration at 050 inch Lift230
Exhaust Duration at 050 inch Lift236
Duration at 050 inch Lift230 int./236 exh.
Advertised Intake Duration284
Advertised Exhaust Duration290
Advertised Duration284 int./290 exh.
Intake Valve Lift with Factory Rocker Arm Ratio0.547 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio0.547 in.
Valve Lift with Factory Rocker Arm Ratio0.547 int./0.547 exh.
Grind NumberCB XM 284HR-12
Computer-Controlled CompatibleNo
Lifters IncludedYes
Lifter StyleHydraulic roller
Valve Springs IncludedYes
Outside Diameter of Outer Spring (in.)1.509 in.
Retainers IncludedYes
Locks IncludedYes
Valve Stem Seals IncludedYes
Timing Chain and Gears IncludedYes
Timing Chain StyleDouble non-roller
Assembly Lubricant IncludedNo
Pushrods IncludedYes
Rocker Arms IncludedNo
Gaskets IncludedNo
Valve Springs RequiredNo
QuantitySold as a kit.
NotesDesigned for marine use. Requires thrust button and wear plate.

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