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COMP Cams Camshaft CS 285Tk-R6

SKU: CCA12-859-9

Camshafts

CCA Camshafts...

COMP Cams Camshaft CS 285Tk-R6

SKU: CCA12-859-9

Camshafts

CCA Camshafts...

A$1,153.71
Limited Availability from MFR Limited stock available from the manufacturer's distribution centre. The dispatch timeframe shown is an estimate based on historical orders of this part. This item is not held in our own warehouse, and availability and release timing may vary depending on manufacturer stock movements and processing at the time of ordering.
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Description

SBC - 1955-57 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

Fits Chevrolet GEN 1 Small Blocks including the 262, 265, 267, 283, 302, 305, 307, 327, 350 and 400. Does not fit LT1/LT4, or factory roller Small Blocks built from 1985 and newer. GM gradually added roller camshafts to 305's and 350's from the mid 80's forward. Camaros/Firebirds/Corvettes received the roller cams early, but many trucks and SUV's had flat tappet cams until the mid 90's. Remove the intake or timing cover to confirm whether the block is a factory roller or flat tappet. Does not fit the LS1, LS2, LS3 or any LS-based 4.8, 5.3, 5.7, 6.0 and 6.2. 1955-1957 Chevrolet 265 engines require a groove on the 5th cam journal for oiling. Contact us for more information.

Product Details

Advertised Exhaust Duration:298
Advertised Intake Duration:285
Amazon ASIN:B001O09PVK
Assembly Lubricant Included:No
Basic Operating RPM Range:3,500-7600
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:Solid Roller
Camshaft Gear Attachment:3-Bolt
Camshaft Material:Billet Steel
Camshaft Series:Oval Track Xtreme TK
Description:Oval Track 257/266 Solid Roller Cam for Chevrolet Small Block
Engine Family:Chevrolet 262-400 c.i. 8 Cylinder (1958-1998)
Exhaust Duration @ .050 in.:266
Exhaust Duration at .050 inch Lift:266
Exhaust Duration:298
Exhaust Valve Lift(in):0.637
Exhaust Valve Lift:0.637
Grind Number:285TKR-6
Intake Duration @ .050 in.:257
Intake Duration at .050 Inch Lift:257
Intake Duration:285
Intake Valve Lift(in):0.645
Intake Valve Lift:0.645
Lifter Type:Solid Roller
Lifters Included:No
Lobe Separation:106
Part Number:cca12-859-9
RPM Range:3000-9000
Title:Oval Track 257/266 Solid Roller Cam for Chevrolet Small Block
Usage:Strip
Valve Springs Required:Yes

Application Summary

Fits Chevrolet GEN 1 Small Blocks including the 262, 265, 267, 283, 302, 305, 307, 327, 350 and 400. Does not fit LT1/LT4, or factory roller Small Blocks built from 1985 and newer. GM gradually added roller camshafts to 305's and 350's from the mid 80's forward. Camaros/Firebirds/Corvettes received the roller cams early, but many trucks and SUV's had flat tappet cams until the mid 90's. Remove the intake or timing cover to confirm whether the block is a factory roller or flat tappet. Does not fit the LS1, LS2, LS3 or any LS-based 4.8, 5.3, 5.7, 6.0 and 6.2. 1955-1957 Chevrolet 265 engines require a groove on the 5th cam journal for oiling. Contact us for more information.

Part Type

Engine Camshaft

Data: v4.2 - Upd: 2026-10-13 17:49:21

Specifications

Product Attributes - Brand
COMP Cams
Product Attributes - Manufacturer's Part Number
12-859-9
Product Attributes - Part Type
Camshafts
Product Attributes - Product Line
COMP Cams Oval Track Camshafts
Product Attributes - UPC
036584015437
Product Attributes - Cam Style
Solid roller, Retro-fit
Product Attributes - Camshaft Use
Drag race
Product Attributes - Camshaft Manufacturers Description
355-406 late model. Great small cube IMCA.
Product Attributes - Basic Operating RPM Range
3,500-7,600
Product Attributes - Intake Duration at 050 inch Lift
257
Product Attributes - Exhaust Duration at 050 inch Lift
266
Product Attributes - Duration at 050 inch Lift
257 int./266 exh.
Product Attributes - Advertised Intake Duration
285
Product Attributes - Advertised Exhaust Duration
298
Product Attributes - Advertised Duration
285 int./298 exh.
Product Attributes - Intake Valve Lift with Factory Rocker Arm Ratio
0.645 in.
Product Attributes - Exhaust Valve Lift with Factory Rocker Arm Ratio
0.637 in.
Product Attributes - Valve Lift with Factory Rocker Arm Ratio
0.645 int./0.637 exh.
Product Attributes - Lobe Separation (degrees)
106
Product Attributes - Camshaft Gear Attachment
3-bolt
Product Attributes - Remanufactured
No
Product Attributes - Computer-Controlled Compatible
No
Product Attributes - Grind Number
CS 285TK-R6
Product Attributes - Valve Springs Required
Yes
Product Attributes - Quantity
Sold individually.

Reference Information

Brand Name/s Comp Cams
StreetFX SKU cca12-859-9
SFX Item ID 4118871
Supplier Item Code 4118871
Manufacturer SKU 12-859-9
Manufacturer UPC 36584015437
Alternative References l46, l48, l65, lm1, lt-1, l82

Compatibility

Fits Chevrolet GEN 1 Small Blocks including the 262, 265, 267, 283, 302, 305, 307, 327, 350 and 400. Does not fit LT1/LT4, or factory roller Small Blocks built from 1985 and newer. GM gradually added roller camshafts to 305's and 350's from the mid 80's forward. Camaros/Firebirds/Corvettes received the roller cams early, but many trucks and SUV's had flat tappet cams until the mid 90's. Remove the intake or timing cover to confirm whether the block is a factory roller or flat tappet. Does not fit the LS1, LS2, LS3 or any LS-based 4.8, 5.3, 5.7, 6.0 and 6.2. 1955-1957 Chevrolet 265 engines require a groove on the 5th cam journal for oiling. Contact us for more information.

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