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Street Race Truck More... The Toolbox
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$357.99
COMP Cams 20-603-9 Thumpr Hyd. Roller Camshaft, Mopar S/B
COMP Cams 20-603-9 Thumpr Hyd. Roller Camshaft, Mopar S/B

COMP Cams 20-603-9 Thumpr Hyd. Roller Camshaft, Mopar S/B

Chrysler Small Block V8, Hydraulic Roller Tappet Camshaft Type, 2500 to 6200 RPM Range

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COMP Cams 20-603-9 Thumpr Hyd. Roller Camshaft, Mopar S/B
COMP Cams 20-603-9 Thumpr Hyd. Roller Camshaft, Mopar S/B
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We estimate this item will ship on or before October 31st.
Part # 282206039
$357.99
each
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Important Messages:

  • This item ships directly from the manufacturer. It may take an additional 10 business days for COMP Cams to ship this item.
  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
  • This item ships via Ground Shipping only. Expedited and Air shipping options are not available.

Details

Camshaft Type:
Hydraulic Roller Tappet
RPM Range:
2500 to 6200
Intake Duration:
299
Exhaust Duration:
319
Lobe Separation:
107 °
Grind Number:
299THR7
Intake Duration @ .050" Lift:
243
Exhaust Duration @ .050" Lift:
257
Intake Valve Lift w/ Rocker Arm Ratio:
0.533"
Exhaust Valve Lift w/ Rocker Arm Ratio:
0.519"
MFG. Part #:
20-603-9
GTIN Code:
036584150978
Computer-Controlled Compatible:
No
Valve Springs Required:
Yes
Sold in Quantity:
Each

Info

COMP Cams Big Mutha Thumpr 299THR-7 Hydraulic Roller Camshaft for Small Block Chrysler.

Thumpr Retro-Fit Hydraulic Roller Camshafts. Hydraulic Roller-(Big Mutha' Thumpr) Street/strip, needs 9.5:1 CR , 2800+ stall, intake, gears, and headers, very rough idle. 3 grinds to fit all of your performance needs. Unique design. Maximizes sound and mid to high RPM power. Ensures safe piston-to-valve clearance. Proven to generate 25+ RWHP gains. Does not compromise durability.

  • Three unique cam designs for each application that deliver excellent horsepower gains & broad torque curve; perfect choice for muscle cars & street rods
  • Early intake valve opening & long exhaust duration create optimum overlap for powerful, hard-hitting exhaust note
  • Best with aftermarket converters & more rear gear

Application

1971-89 Chrysler 318-360
1964-89 Plymouth 273-360
1964-91 Dodge 273-360
Some parts are not legal for use in California or other states with similar laws/regulations

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  • What happens when you advance or retard a camshaft? In this tech article, we explain the pros and cons of installing your cam straight up, advancing or retarding.
  • Learn the basics to engine performance like; how does a cam work? What is Valve lift, duration, lobe separation angle, and cam profiles? Afterwords selecting the right camshaft will be less of a guessing game!

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