Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
Product Discontinued
COMP CAMSPART NUMBER: 249-K51-600-9
Thumpr Retro-Fit Hydraulic Roller Camshaft Complete Kit Lift: .513"/.498"
Currently Unavailable
This product is no longer available. Please call customer service for assistance at 1-800-345-4545.
Pontiac 265-455ci 1955-1981 Non-Factory Roller BlockThumpr
- Thumpr Retro-Fit Hydraulic Roller Camshaft Complete Kit
- Lift: .513"/.498"
- Duration: 283°/303°
- Lobe Separation Angle: 107°
- RPM Range: 1700-5500
- Complete Camshaft Kit
- 3 Grinds To Fit All Of Your Performance Needs
- Long Exhaust Duration
- Produces A Powerful Hard-Hitting Exhaust Note
- Excellent Horsepower Gains And Broad Torque Curve
- Delivers Real Seat Of The Pants Performance
- Designed For Use w/Latest In ValveTrain Components
- 1 Year Limited Warranty
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.
Part TypeCamshaft Kit
BrandCOMP CAMS
Package Height5.0
Package Width10.5
Package Length26.0
Weight28.0 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)241
Cam StyleHydraulic roller tappet
Grind Number283THR7
Exh. Duration Advertised (Deg)303
Locks IncludedYes
Engine Make/SizePontiac 265-455
Retainers IncludedYes
Intake Valve Lift With Factory Rocker Arm Ratio (I0.513
Int. Duration @ .050 In. (Deg)227
Assembly Lubricant IncludedYes
Basic Operating Rpm Range1,700-5,500
Pushrods IncludedNo
Gaskets IncludedNo
Rocker Arms IncludedNo
Intake Valve Lift0.513 in (13.03 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)283
Lobe Separation (Deg)107
Rpm Range1700-5500
Lifter StyleHydraulic roller
Advertised Duration283 int./303 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.498
Valve Springs IncludedYes
UsageStreet/Hi-Performance
Valve Lift With Factory Rocker Arm Ratio0.513 int./0.498 exh.
QuantitySold as a kit
Valve Stem Seals IncludedYes
Exhaust Valve Lift0.498 in (12.649 mm)
Advertised Intake Duration283
Outside Diameter Of Outer Spring1.437 in (36.5 mm)
Intake Duration At 050 Inch Lift227
Exhaust Duration At 050 Inch Lift241
Timing Chain StyleDouble roller
Timing Chain And Gears IncludedYes
Advertised Exhaust Duration303
Lifter TypeHydraulic Roller Retrofit
Part FitmentSemi Universal
Duration At 050 Inch Lift227 int./241 exh.
Valve Springs RequiredYes
Lifters IncludedYes
Vendor Part NumberK51-600-9
Package Qty1
Package TypeEA
No Questions
No Reviews
Items You Need
![Break-In/Engine Oil Supplement [12 oz. Bottle]](https://www.jegs.com/images/mini_200/500/555/555-28060.jpg)
![Precision Cam Degree Wheel Kit [11 in.]](https://www.jegs.com/images/mini_200/500/555/555-81621.jpg)
![Engine Assembly Lube [4 oz. Bottle]](https://www.jegs.com/images/mini_200/500/555/555-28000.jpg)
JEGS
Universal Camshaft Installation/Removal Tool Includes 4 camshaft adapters
Part Number : 555-80599
$4779$51.99
You Save$4.20
![Valve Spring Compressor [Stud Mount]](https://www.jegs.com/images/mini_200/500/555/555-80518.jpg)
![Valve Spring Compressor [Stud Mount]](https://www.jegs.com/images/mini_200/500/555/555-80521.jpg)
JEGS
Part Number : 555-80599
$4779$51.99
You Save$4.20
Some parts are not legal for use in California or other states with similar laws / regulations
