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COMP Cams Camshaft CS 301QnHR-6

SKU: CCA12-870-11

Camshafts

CCA Camshafts...

COMP Cams Camshaft CS 301QnHR-6

SKU: CCA12-870-11

Camshafts

CCA Camshafts...

A$1,284.52
Last Available from MFR. LAST ONE AVAILABLE from the manufacturer's distribution centre. Once sold, this item may not be immediately available again. The dispatch timeframe shown is an estimate based on historical orders for this part and is dependent on the manufacturer releasing the final available unit.

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Description

DR 248/256 HrlrSBC

Drag Race 248/256 Hydraulic Roller Cam. 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.

Additional Information

Good 1/8" mile bracket race cam. Needs 10:1+ compression and 8500+ stall.

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

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.

Data: v4.2 - Upd: 2026-11-07 21:25:14

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:311
Advertised Intake Duration:301
Assembly Lubricant Included:No
Basic Operating RPM Range:3,500-6,500
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:Billet Steel
Camshaft Series:Drag Race
Description:Drag Race 248/256 Hydraulic Roller Cam for Chevrolet Small Block
Engine Family:Chevrolet 262-400 c.i. 8 Cylinder (1958-1998)
Exhaust Duration @ .050 in.:256
Exhaust Duration at .050 inch Lift:256
Exhaust Duration:311
Exhaust Valve Lift(in):0.582
Exhaust Valve Lift:0.582
Grind Number:301QNHR-6
Intake Duration @ .050 in.:248
Intake Duration at .050 Inch Lift:248
Intake Duration:301
Intake Valve Lift(in):0.597
Intake Valve Lift:0.597
Lifter Type:Hydraulic Roller
Lifters Included:No
Part Number:cca12-870-11
RPM Range:3500-6500
Title:Drag Race 248/256 Hydraulic Roller Cam for Chevrolet Small Block
Usage:Strip
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 19:01:26

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Comp Cams, Comp Cams (edelbrock)
StreetFX SKU cca12-870-11
SFX Item ID 4118879
Accounting SKU cca-12-870-11
Manufacturer SKU 12-870-11
Manufacturer UPC 036584265474
Alternative References 12-870-11, CCA-12-870-11

Camshaft, Hydraulic Roller, Duration 301 Int./311 Exh., Lift 0.597 Int./0.582 Exh., Lobe Separation 106, Chevy, SBC, 262-400, Each

COMP Cams drag race camshafts are offered in four styles: hydraulic flat tappet, hydraulic roller tappet, mechanical roller tappet, and mechanical flat tappet. These cams are ideal for the performance demands of the dragstrip, as well as street, strip, Circle Track, and other applications. Over a hundred models are available; choose the camshaft designed for your vehicle and engine family.

Product Attributes
BrandCOMP Cams
Manufacturer's Part Number12-870-11
Part TypeCamshafts
Product LineCOMP Cams Drag Race Camshafts
UPC036584265474
Cam StyleHydraulic roller, Retro-fit
Camshaft UseDrag race
Basic Operating RPM Range3,500-6,500
Intake Duration at 050 inch Lift248
Exhaust Duration at 050 inch Lift256
Duration at 050 inch Lift248 int./256 exh.
Advertised Intake Duration301
Advertised Exhaust Duration311
Advertised Duration301 int./311 exh.
Intake Valve Lift with Factory Rocker Arm Ratio0.597 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio0.582 in.
Valve Lift with Factory Rocker Arm Ratio0.597 int./0.582 exh.
Camshaft Gear Attachment3-bolt
RemanufacturedNo
Computer-Controlled CompatibleNo
Grind Number301QNHR-6
Valve Springs RequiredYes
QuantitySold individually.

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