Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
Vehicle Info NeededCOMP CAMSPART NUMBER: 249-34-600-9
Thumpr Retro-Fit Hydraulic Roller Camshaft Lift: .557"/.539"
$55895
Ships on Sep 14, 2026
Lowest Price GuaranteeFord 429, 460 c.i. 8 CYL. 1968-1995 Non-Factory Roller BlockThumpr
- Thumpr Retro-Fit Hydraulic Roller Camshaft
- Lift: .557"/.539"
- Duration: 283°/303°
- Lobe Separation Angle: 107°
- RPM Range: 1900-5600
Thumpr™ : High performance street, stock converter ok, best with 2000+ converter and gears, choppy/thumping idle.Ford; 429; 460; BBF; Big Block Ford; 385; Cobra Jet; 429 Cobra Jet; Interceptor; Lima; F100; F150; F250; Super Duty; E150; E250
High performance street, stock converter ok, best with 2000+ converter and gears, choppy/thumping idle.
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
Part TypeCamshaft
BrandCOMP CAMS
Package Height2.8
Package Width3.0
Package Length24.3
Weight12.55 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)241
Cam StyleHydraulic roller tappet
Grind Number283THR7
Exh. Duration Advertised (Deg)303
Engine Make/SizeFord 429-460
Intake Valve Lift With Factory Rocker Arm Ratio (I0.557
Int. Duration @ .050 In. (Deg)227
Basic Operating Rpm Range1,900-5,600
Intake Valve Lift0.557 in (14.148 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)283
Lobe Separation (Deg)107
Rpm Range1900-5600
Advertised Duration283 int./303 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.539
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.557 int./0.539 exh.
QuantitySold individually
Exhaust Valve Lift0.539 in (13.691 mm)
Advertised Intake Duration283
Intake Duration At 050 Inch Lift227
Exhaust Duration At 050 Inch Lift241
Advertised Exhaust Duration303
Lifter TypeHydraulic Roller Retrofit
Duration At 050 Inch Lift227 int./241 exh.
Valve Springs RequiredYes
Vendor Part Number34-600-9
Package Qty1
Package TypeEA
No Questions
No Reviews
Items You Need
![Engine Assembly Lube [4 oz. Bottle]](https://www.jegs.com/images/mini_200/500/555/555-28000.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
![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)
Some parts are not legal for use in California or other states with similar laws / regulations
