COMP Cams Thumpr Hydraulic Flat Tappet Camshaft Lift .478"/.465" Duration 279/297 RPM Range 2000-5800
249-51-600-5

Items You Need
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Pontiac 265-455ci 8 cyl. 1955-1981
Pontiac; Super Duty; SD; SD455; HO; 455 HO; Trans-Am; Catalina; Firebird; Formula; 421; 455; 400; 428; 350; 265; 301; 370; 389; 301; 287; 317; 347; Ram Air; Ram Air IV; Ram Air III; Bonneville; Grand Prix; LeMans; Parisienne; Grand Am; Century; Regal;
High performance street, stock converter ok, best with 2000+ converter and gears. Choppy/thumping idle.
Specifications:
Thumpr Camshafts are the hottest cams to hit the streets in more than a decade. That's because they give you the big cam sound you're looking for, without the drawbacks. Applying a camshaft design originally created for sports car endurance racing, they incorporate early exhaust valve opening, long exhaust duration, and a generous amount of intake and exhaust overlap. Best of all, Thumprs will not negatively impact power output or streetability.
Features:![]() Thumpr Sound Clip ![]() |
Camshaft & Lifter Kits are indicated by a CL in their part number and include Camshaft, Lifters, Assembly Lube, Decals, and Instructions.
Complete Kits are indicated by a K in their part number and include Camshaft, Lifters, Timing Chain & Gears, Valve Springs, Retainers, Locks, Assembly Lube, Decals, and Instructions.
Does COMP Cams 51-600-5 fit your vehicle?
1970 PONTIAC CATALINA
- Liter: 6.6
- SubModel: VENTURA
- Aspiration: NATURALLY ASPIRATED
- CUI: 400
- Engine Type: V8 ( 6.6L / 400 )
- Engine Vin: -
1965 PONTIAC BONNEVILLE
- Liter: 6.9
- SubModel: SAFARI
- Aspiration: NATURALLY ASPIRATED
- CUI: 421
- Engine Type: V8 ( 6.9L / 421 )
- Engine Vin: -
1970 PONTIAC TEMPEST
- Liter: 5.7
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- CUI: 350
- Engine Type: V8 ( 5.7L / 350 )
- Engine Vin: -
1968 PONTIAC CATALINA
- Liter: 6.6
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- CUI: 400
- Engine Type: V8 ( 6.6L / 400 )
- Engine Vin: -
1968 PONTIAC LEMANS
- Liter: 5.7
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- CUI: 350
- Engine Type: V8 ( 5.7L / 350 )
- Engine Vin: -
1977 PONTIAC FIREBIRD
- Liter: 6.6
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- CUI: 403
- Engine Type: V8 ( 6.6L / 403 )
- Engine Vin: K
1964 PONTIAC GRAND PRIX
- Liter: 6.4
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- CUI: 389
- Engine Type: V8 ( 6.4L / 389 )
- Engine Vin: -
1961 PONTIAC BONNEVILLE
- Liter: 6.4
- SubModel: SAFARI
- Aspiration: NATURALLY ASPIRATED
- CUI: 389
- Engine Type: V8 ( 6.4L / 389 )
- Engine Vin: -
1962 PONTIAC STAR CHIEF
- Liter: 6.4
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- CUI: 389
- Engine Type: V8 ( 6.4L / 389 )
- Engine Vin: -
1961 PONTIAC TEMPEST
- Liter: 6.4
- SubModel: SAFARI
- Aspiration: NATURALLY ASPIRATED
- CUI: 389
- Engine Type: V8 ( 6.4L / 389 )
- Engine Vin: -
1970 PONTIAC EXECUTIVE
- Liter: 6.6
- SubModel: SAFARI
- Aspiration: NATURALLY ASPIRATED
- CUI: 400
- Engine Type: V8 ( 6.6L / 400 )
- Engine Vin: -
1961 PONTIAC BONNEVILLE
- Liter: 6.4
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- CUI: 389
- Engine Type: V8 ( 6.4L / 389 )
- Engine Vin: -
Motor Vehicles
WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.
Tools:
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.
Electrical Cords
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.