Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
Vehicle Info NeededCOMP CAMSPART NUMBER: 249-CL20-601-9
Mutha Thumpr Retro-Fit Hydraulic Roller Camshaft & Lifter Kit Lift: .522"/.509"
$1,25095
Ships on Oct 28, 2026
Lowest Price GuaranteeCurrently Unavailable
This product is currently not available. Please call customer service for assistance at 1-800-345-4545.
Chrysler 273-360 ci. 8 Cyl. 1964-2003 Non-Factory Roller Block Mutha Thumpr
- Mutha Thumpr Retro-Fit Hydraulic Roller Camshaft & Lifter Kit
- Lift: .522"/.509"
- Duration: 291°/311°
- Lobe Separation Angle: 107°
- RPM Range: 2200-5900
Valve Setting: Intake - Hyd, Exhaust - Hyd
RPM Operating Range: 2200 to 5900
Cam Grind Number: 291THR7
Duration Advertised: Intake - 291, Exhaust - 311
Duration @ .050': Intake - 235, Exhaust - 249
Valve Lift: Intake - .521, Exhaust - .507
Lobe Sep. Angle: 107°273, 360, 318, AMC, Dodge, Mopar, Plymouth, Dart, Road Runner, Charger, Challenger, 383, 400, 440, 426, HEMI, 426 Wedge, 426 HEMI, RB, B, HEMI, 392, Chrysler, LA
High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough 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 Kit
BrandCOMP CAMS
Package Height3.0
Package Width5.5
Package Length26.0
Weight16.0 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)249
Cam StyleHydraulic roller tappet
Grind Number291THR7
Exh. Duration Advertised (Deg)319
Locks IncludedNo
Engine Make/SizeMopar 273-360
Retainers IncludedNo
Intake Valve Lift With Factory Rocker Arm Ratio (I0.522
Int. Duration @ .050 In. (Deg)235
Assembly Lubricant IncludedNo
Basic Operating Rpm Range2,200-5,900
Pushrods IncludedNo
Gaskets IncludedNo
Rocker Arms IncludedNo
Intake Valve Lift0.522 in (13.259 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)299
Lobe Separation (Deg)107
Rpm Range2200-5900
Lifter StyleHydraulic roller
Advertised Duration291 int./311 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.509
Valve Springs IncludedNo
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.522 int./0.509 exh.
QuantitySold as a kit
Valve Stem Seals IncludedNo
Exhaust Valve Lift0.509 in (12.929 mm)
Advertised Intake Duration291
Intake Duration At 050 Inch Lift235
Exhaust Duration At 050 Inch Lift249
Timing Chain And Gears IncludedNo
Advertised Exhaust Duration311
Lifter TypeHydraulic Roller Retrofit
Duration At 050 Inch Lift235 int./249 exh.
Valve Springs RequiredYes
Lifters IncludedYes
Vendor Part NumberCL20-601-9
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_200/500/555/555-80521.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_200/500/555/555-80518.jpg)
Some parts are not legal for use in California or other states with similar laws / regulations
