Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
Product Discontinued
COMP CAMSPART NUMBER: 249-CL51-602-9
Big Mutha Thumpr Retro-Fit Hydraulic Roller Camshaft & Lifter Kit Lift: .532"/.519"
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 BlockBig Mutha Thumpr
- Big Mutha Thumpr Retro-Fit Hydraulic Roller Camshaft & Lifter Kit
- Lift: .532"/.519"
- Duration: 299°/319°
- Lobe Separation Angle: 107°
- RPM Range: 2300-6100
- Camshaft And Lifter 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;
Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.
Part TypeCamshaft Kit
BrandCOMP CAMS
Package Height3.5
Package Width5.8
Package Length25.5
Weight15.71 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)257
Cam StyleHydraulic roller tappet
Grind Number299THR7
Exh. Duration Advertised (Deg)319
Locks IncludedNo
Engine Make/SizePontiac 265-455
Retainers IncludedNo
Intake Valve Lift With Factory Rocker Arm Ratio (I0.532
Int. Duration @ .050 In. (Deg)243
Assembly Lubricant IncludedNo
Basic Operating Rpm Range2,300-6,100
Pushrods IncludedNo
Gaskets IncludedNo
Rocker Arms IncludedNo
Intake Valve Lift0.532 in (13.513 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)299
Lobe Separation (Deg)107
Rpm Range2300-6100
Lifter StyleHydraulic roller
Advertised Duration299 int./319 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.519
Valve Springs IncludedNo
UsageStreet/Strip
Valve Lift With Factory Rocker Arm Ratio0.532 int./0.519 exh.
QuantitySold as a kit
Valve Stem Seals IncludedNo
Exhaust Valve Lift0.519 in (13.183 mm)
Advertised Intake Duration299
Intake Duration At 050 Inch Lift243
Exhaust Duration At 050 Inch Lift257
Timing Chain And Gears IncludedNo
Advertised Exhaust Duration319
Lifter TypeHydraulic Roller Retrofit
Duration At 050 Inch Lift243 int./257 exh.
Valve Springs RequiredYes
Lifters IncludedYes
Vendor Part NumberCL51-602-9
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)
![Valve Spring Compressor [Stud Mount]](https://www.jegs.com/images/mini_200/500/555/555-80521.jpg)
![Valve Spring Compressor [Stud Mount]](https://www.jegs.com/images/mini_200/500/555/555-80518.jpg)
![Precision Cam Degree Wheel Kit [11 in.]](https://www.jegs.com/images/mini_200/500/555/555-81621.jpg)
JEGS
Universal Camshaft Installation/Removal Tool Includes 4 camshaft adapters
Part Number : 555-80599
$4779$51.99
You Save$4.20
![Engine Assembly Lube [4 oz. Bottle]](https://www.jegs.com/images/mini_200/500/555/555-28000.jpg)
Some parts are not legal for use in California or other states with similar laws / regulations
