Description
Camshaft - Big Mutha' Thumpr - Hydraulic Roller - Lift 0.533 / 0.519 in - Duration 299 / 319 - 107 LSA - 2500 / 6200 RPM - Small Block Chevy - Each
COMP Cams Camshaft CS 299T HR-107 BMT T
Big Mutha' Thumpr 243/257 Hydraulic Roller Cam
Additional Information
Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.
Application Summary
Fits '87+ GEN 1 Chevrolet 305-350 Small Blocks w/ Factory Roller Camshafts (Not LT-1/LS1 etc)
Part Type
Engine Camshaft
Product Overview
*Thumpr Camshafts*
• Three unique cam designs for each application that deliver excellent horsepower gains and broad torque curve; perfect choice for muscle cars and street rods
• Early intake valve opening and long exhaust duration create optimum overlap for powerful, hard-hitting exhaust note
• Best with aftermarket converters and more rear gear
| Additional Application Notes | |
|---|---|
| • Fits only 1987 and newer blocks that have provisions (spider tray) for a roller camshaft. | |
| • Retro-Fit Hyd. Roller; 1900-5600rpm; Adv. Dur. 299 Int./319 Exh.; Valve Lift .533 Int/.519 Exh.; Lobe Angle 107 deg.; | |
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: | 319 |
| Advertised Intake Duration: | 299 |
| Amazon ASIN: | B002EDWNQ0 |
| Assembly Lubricant Included: | No |
| Basic Operating RPM Range: | 1,900-5,600 |
| 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 |
| Cam and Lifter Kit Upgrade: | CL08-602-8 |
| Cam, Lifter and Gear Drive Upgrade: | GK08-602-8 |
| Camshaft Gear Attachment: | 3-Bolt |
| Camshaft Material: | Austempered Ductile Iron |
| Camshaft Series: | Thumpr |
| Description: | Big Mutha' Thumpr 243/257 Hydraulic Roller Cam for OE Roller SBC |
| Engine Family: | Chevrolet 305-350 c.i. 8 Cylinder O.E. Roller (1987-1998) |
| Exhaust Duration @ .050 in.: | 257 |
| Exhaust Duration at .050 inch Lift: | 257 |
| Exhaust Duration: | 319 |
| Exhaust Valve Lift(in): | 0.519 |
| Exhaust Valve Lift: | 0.519 |
| Grind Number: | 299THR7 |
| Intake Duration @ .050 in.: | 243 |
| Intake Duration at .050 Inch Lift: | 243 |
| Intake Duration: | 299 |
| Intake Valve Lift(in): | 0.533 |
| Intake Valve Lift: | 0.533 |
| K-Kit Upgrade: | K08-602-8 |
| Lifter Type: | Hydraulic Roller |
| Lifters Included: | No |
| Part Number: | cca08-602-8 |
| RPM Range: | 1000-7000 |
| Title: | Big Mutha' Thumpr 243/257 Hydraulic Roller Cam for OE Roller SBC |
| 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 | cca08-602-8 |
| SFX Item ID | 4118288 |
| Accounting SKU | cca-08-602-8 |
| Manufacturer SKU | 08-602-8 |
| Manufacturer UPC | 036584171997 |
| Alternative References | 08-602-8, CCA-08-602-8, COM08-602-8 |
Camshaft, Hydraulic Roller Tappet, Advertised Duration 299/319, Lift .533/.519, Chevy, Small Block, Each
COMP Cams has awakened the muscle car sound--and it is nastier than ever! Thumpr Series camshafts is a line of cutting-edge hydraulic roller camshafts for engines originally equipped with flat tappet cams. With them, you can expect a substantial power increase without sacrificing reliability or ease of maintenance! The lobe profile and grind characteristics of Thumpr cams include blending an early exhaust valve opening, a long exhaust duration, and a generous amount of intake and exhaust overlap. This maximizes rough-idling tendencies, delivering a seriously aggressive exhaust note without affecting engine power output. Thumpr camshafts are available in a variety of grind profiles, each producing impressive horsepower and torque performance within a different rpm range.
| Product Attributes | |
|---|---|
| Brand | COMP Cams |
| Manufacturer's Part Number | 08-602-8 |
| Part Type | Camshafts |
| Product Line | COMP Cams Thumpr Hydraulic Roller Camshafts |
| UPC | 036584171997 |
| Cam Style | Hydraulic roller, OE roller |
| Camshaft Use | Street/Strip |
| Basic Operating RPM Range | 2,500-6,200 |
| Intake Duration at 050 inch Lift | 243 |
| Exhaust Duration at 050 inch Lift | 257 |
| Duration at 050 inch Lift | 243 int./257 exh. |
| Advertised Intake Duration | 299 |
| Advertised Exhaust Duration | 319 |
| Advertised Duration | 299 int./319 exh. |
| Intake Valve Lift with Factory Rocker Arm Ratio | 0.533 in. |
| Exhaust Valve Lift with Factory Rocker Arm Ratio | 0.519 in. |
| Valve Lift with Factory Rocker Arm Ratio | 0.533 int./0.519 exh. |
| Camshaft Gear Attachment | 3-bolt |
| Remanufactured | No |
| Computer-Controlled Compatible | No |
| Grind Number | 299THR7 |
| Valve Springs Required | Yes |
| Quantity | Sold individually. |
Compatibility
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