COMP Cams Camshaft CS 305Qio8
COMP Cams Camshaft CS 305Qio8
A$1,432.21
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
The Camshafts feature four different lobe patterns with one intake and exhaust design for outboard runners, and another intake and exhaust design for the inboard runners. While the four inboard cylinders are all the same grinds, the outboard exhaust openings are two degrees earlier, with outboard intake closings coming two degrees later. This is the first ever use of Technology in street vehicles to balance air/fuel ratio per cylinder and can net you a possible 1000+ RPM over other hydraulic Rollers and anywhere from 5-20+ horsepower peak to peak, depending on cylinder head flow. The 4-Pattern hydraulic Roller cams are CNC-Machined from Steel billet cores with cast iron distributor drive Gears. The cams also feature a tight lobe separation for both excellent performance and a throaty sound. 1: Cams for '55-'57 engines can be custom ordered. 2: The '87+ Chevy Small Block received provisions for Roller lifters. Most '87 - '93 GM cars came with Roller lifters, but most '87 - '95 trucks came with flat tappet lifters in Roller lifter style blocks. If your block has '87+ OEM-style Roller Cam provisions but does not have Roller components fitted, COMP Hydraulic Roller Lifter Install Kit for '91-'02 Blocks can be purchased. As well as a '87+ OE-Style COMP Hydraulic Roller Cam.
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 Inboard Exhaust Duration: | 317 |
|---|---|
| Advertised Inboard Intake Duration: | 305 |
| Advertised Outboard Exhaust Duration: | 319 |
| Advertised Outboard Intake Duration: | 307 |
| Amazon ASIN: | B00CWZVB2C |
| Assembly Lubricant Included: | No |
| Basic Operating RPM Range: | 3300-7,500 |
| 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 |
| Camshaft Gear Attachment: | 3-Bolt |
| Camshaft Material: | Billet Steel |
| Camshaft Series: | 4-Pattern |
| Description: | 4-Pattern 253/263 IB, 255/265 OB Hydraulic Roller Cam for Chevrolet Small Block |
| Engine Family: | Chevrolet 262-400 c.i. 8 Cylinder (1958-1998) |
| Exhaust Duration @ .050 in.: | 265 |
| Exhaust Duration: | 319 |
| Exhaust Valve Lift(in): | 0.622 |
| Grind Number: | 305QIO8 |
| Inboard Exhaust Duration at .050 inch Lift: | 263 |
| Inboard Exhaust Valve Lift: | 0.622 |
| Inboard Intake Duration at .050 Inch Lift: | 253 |
| Inboard Intake Valve Lift: | 0.638 |
| Intake Duration @ .050 in.: | 255 |
| Intake Duration: | 307 |
| Intake Valve Lift(in): | 0.638 |
| Lifter Type: | Hydraulic Roller |
| Lifters Included: | No |
| Outboard Exhaust Duration at .050 inch Lift: | 265 |
| Outboard Exhaust Valve Lift: | 0.622 |
| Outboard Intake Duration at .050 Inch Lift: | 255 |
| Outboard Intake Valve Lift: | 0.638 |
| Part Number: | cca12-476-44 |
| RPM Range: | 3300-7500 |
| Title: | 4-Pattern 253/263 IB, 255/265 OB Hydraulic Roller Cam for Chevrolet Small Block |
| Usage: | Street/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
Specifications
- Product Attributes - Brand
- COMP Cams
- Product Attributes - Manufacturer's Part Number
- 12-476-44
- Product Attributes - Part Type
- Camshafts
- Product Attributes - Product Line
- COMP Cams 4-Pattern Hydraulic Roller Camshafts
- Product Attributes - UPC
- 036584259671
- Product Attributes - Cam Style
- Hydraulic roller, Retro-fit
- Product Attributes - Camshaft Use
- Street/Strip
- Product Attributes - Camshaft Manufacturers Description
- Recommended in larger cubic inch and high compression applications, 3,500+ stall.
- Product Attributes - Basic Operating RPM Range
- 3,300-7,500
- Product Attributes - Intake Duration at 050 inch Lift
- 255/253
- Product Attributes - Exhaust Duration at 050 inch Lift
- 265/263
- Product Attributes - Duration at 050 inch Lift
- 255 int./265 exh., 253 int./263 exh.
- Product Attributes - Advertised Intake Duration
- 307/305
- Product Attributes - Advertised Exhaust Duration
- 319/317
- Product Attributes - Advertised Duration
- 307 int./319 exh., 305 int./317 exh.
- Product Attributes - Intake Valve Lift with Factory Rocker Arm Ratio
- 0.638 in./0.638 in.
- Product Attributes - Exhaust Valve Lift with Factory Rocker Arm Ratio
- 0.622 in./0.622 in.
- Product Attributes - Valve Lift with Factory Rocker Arm Ratio
- 0.638 int./0.622 exh., 0.638 int./0.622 exh.
- Product Attributes - Lobe Separation (degrees)
- 108
- Product Attributes - Camshaft Gear Attachment
- 3-bolt
- Product Attributes - Remanufactured
- No
- Product Attributes - Computer-Controlled Compatible
- No
- Product Attributes - Grind Number
- 305QIO8
- Product Attributes - Valve Springs Required
- Yes
- Product Attributes - Quantity
- Sold individually.
Reference Information
| Brand Name/s | Comp Cams |
|---|---|
| StreetFX SKU | cca12-476-44 |
| SFX Item ID | 4118697 |
| Supplier Item Code | 4118697 |
| Manufacturer SKU | 12-476-44 |
| Manufacturer UPC | 36584259671 |
| Alternative References | l46, l48, l65, lm1, lt-1, l82 |
Brochures
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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