Description
Camshaft - Magnum - Mechanical Roller - Lift 0.575 / 0.575 in - Duration 300 / 300 - 110 LSA - 3000 / 7000 RPM - Small Block Chevy - Each
Mag 255/255 SRlrSBC
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 email 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.
Additional Information
Excellent choice for maximum street effort, racy idle, 3500+ stall with low gears, 10:1 compression and headers.
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.
| Additional Application Notes | |
|---|---|
| • Requires Thrust Button And Wear Plate~ Not Legal For Sale Or Use On Pollution-Controlled Motor Vehicle Mech. Roller; 3000-7000rpm; Adv. Dur. 300 Int./Exh.; Valve Lift .575 Int./Exh.; Lobe Angle 110 deg.; | |
| • From 1985-1998 Chevrolet introduced the factory roller Small Block into GM cars and trucks. Verify whether or not your vehicle came with a factory roller camshaft. If your vehicle was equipped with a roller camshaft, look to our camshafts and kits that start with "08-". | |
These additional application notes are supplied by the manufacturer and collated from multiple year ranges. Not all of these notes may apply to every year or every variant. Please contact a StreetFX agent for clarification if required.
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: | 300 |
| Advertised Intake Duration: | 300 |
| Amazon ASIN: | B000V9GBU8 |
| Assembly Lubricant Included: | No |
| Basic Operating RPM Range: | 3,000-7000 |
| 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: | Solid Roller |
| Cam and Lifter Kit Upgrade: | CL12-705-8 |
| Camshaft Gear Attachment: | 3-Bolt |
| Camshaft Material: | Austempered Ductile Iron |
| Camshaft Series: | Magnum |
| Description: | Magnum 255/255 Solid Roller Cam for Chevrolet Small Block |
| Engine Family: | Chevrolet 262-400 c.i. 8 Cylinder (1958-1998) |
| Exhaust Duration @ .050 in.: | 255 |
| Exhaust Duration at .050 inch Lift: | 255 |
| Exhaust Duration: | 300 |
| Exhaust Valve Lift(in): | 0.575 |
| Exhaust Valve Lift: | 0.575 |
| Grind Number: | 300AR |
| Intake Duration @ .050 in.: | 255 |
| Intake Duration at .050 Inch Lift: | 255 |
| Intake Duration: | 300 |
| Intake Valve Lift(in): | 0.575 |
| Intake Valve Lift: | 0.575 |
| K-Kit Upgrade: | K12-705-8 |
| Lifter Type: | Solid Roller |
| Lifters Included: | No |
| Part Number: | cca12-705-8 |
| RPM Range: | 3000-9000 |
| SK-Kit Upgrade: | SK12-705-8 |
| Title: | Magnum 255/255 Solid Roller Cam for Chevrolet Small Block |
| Usage: | Street/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.
Reference Information
| Reference Data (Provide these details to our support team) | |
|---|---|
| Brand Name/s | Comp Cams, Comp Cams (edelbrock) |
| StreetFX SKU | cca12-705-8 |
| SFX Item ID | 4118820 |
| Accounting SKU | cca-12-705-8 |
| Manufacturer SKU | 12-705-8 |
| Manufacturer UPC | 036584700067 |
| Alternative References | 12-705-8, CCA-12-705-8, COM12-705-8 |
Camshaft, Mechanical Roller Tappet, Advertised Duration 300/300, Lift .575/.575, Chevy, Small Block, Each
COMP Cams Magnum solid roller camshafts are designed for everyone from the serious street performance enthusiast—to the all-out competition drag racer. Whether you're driving a street rod or show car with power accessories … or a super gas, super competition car on alcohol, one of these cams will fit your engine's needs.
| Product Attributes | |
|---|---|
| Brand | COMP Cams |
| Manufacturer's Part Number | 12-705-8 |
| Part Type | Camshafts |
| Product Line | COMP Cams Magnum Solid Roller Camshafts |
| UPC | 036584700067 |
| Cam Style | Solid roller, Retro-fit |
| Camshaft Use | Street/Strip |
| Basic Operating RPM Range | 3,000-7,000 |
| Intake Duration at 050 inch Lift | 255 |
| Exhaust Duration at 050 inch Lift | 255 |
| Duration at 050 inch Lift | 255 int./255 exh. |
| Advertised Intake Duration | 300 |
| Advertised Exhaust Duration | 300 |
| Advertised Duration | 300 int./300 exh. |
| Intake Valve Lift with Factory Rocker Arm Ratio | 0.575 in. |
| Exhaust Valve Lift with Factory Rocker Arm Ratio | 0.575 in. |
| Valve Lift with Factory Rocker Arm Ratio | 0.575 int./0.575 exh. |
| Intake Valve Lash | 0.020 in. |
| Exhaust Valve Lash | 0.020 in. |
| Remanufactured | No |
| Computer-Controlled Compatible | No |
| Grind Number | CS 300A-R10 |
| Valve Springs Required | Yes |
| Quantity | Sold individually. |
| Notes | Retrofit style camshaft is designed for early non-roller blocks. Requires thrust button and lock plate. |
Compatibility
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