Comp Cams CL12-602-4 Big Mutha' Thumpr Hydraulic Flat Tappet Cam and Lifter Kit:

• Very rough, lopey idle
• Long exhaust duration produces a powerful hard-hitting exhaust note
• Excellent horsepower gains and broad torque curve
• Grind Number: 295TH7
• Cam Type: Hydraulic Flat Tappet
• Lifter Style: Hydraulic Flat Tappet
• Advertised Intake Duration: 295
• Advertised Exhaust Duration: 313
• Intake Duration at .050 in. Lift: 243
• Exhaust Duration at .050 in. Lift: 257
• Intake Valve Lift: .500 in.
• Exhaust Valve Lift: .486 in.
• Lobe Separation: 107
• Camshaft Gear Attachment: 3-Bolt
• Requires:
  • 9.5:1 compression
  • 2800 or up stall stall converter
  • Aftermarket intake
  • Lower differential gear ratio
  • Headers

FAQ

What lift is a Mutha Thumpr cam?

• The Comp Cams CL12-602-4 Mutha Thumpr cam has a lift of 0.500/0.486 inches.
• This lift profile enhances valve movement for increased performance.

What is a thumper cam?

• A thumper cam, like the Big Mutha' Thumpr 243/257 hydraulic flat cam/lifter kit, features an aggressive idle.
• It provides a distinct, lopey sound, emphasizing performance characteristics.

What are the specs on a Mutha Thumpr cam?

• The Comp Cams CL12-602-4 offers a duration of 243/257 at .050" lift with a 0.500-0.486 lift range.
• Designed for improved low-end torque and high-end horsepower.

Do cam kits come with lifters?

• Yes, the Big Mutha' Thumpr 243/257 hydraulic flat cam/lifter kit (CL12-602-4) includes lifters for a comprehensive installation.

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.

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