Engine Kits

Comp Cams Mutha Thumpr™, 291THR7  Rough Idle, High Performance
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Comp Cams Mutha Thumpr™, 291THR7 Rough Idle, High Performance



Part #: 08-601-8
List Price: $587.98
Our Price: $293.99
You Save: $293.99



Thumpr™ Hydraulic Roller Camshafts for 1987-1998 305-350 Originally Equipped With Hydraulic Roller Camshaft & Most Crate Engines, Except LT1 and LT4. 1900 - 5600 RPM

Hydraulic Roller-(Mutha' Thumpr™) High performance street/strip, needs 9:1 CR, 2500+ stall, intake, gears and headers, rough idle.

Let's face it, nothing grabs our attention at a car show or cruise night more than the hard hitting sound a thumping, high performance idle. Thumpr™ Camshafts deliver that aggressive, head-turning sound like no other cam on the market. Available in hydraulic flat tappet and hydraulic roller camshafts, Thumpr™ Cams are now available for most popular applications, carb and late model efi.

Designed to provide maximum performance when combined with the latest in valve train components, such as Beehive™ Valve Springs, Ultra Pro Magnum™ Rockers and Magnum™ Pushrods

2200-5900 Camshaft Operating Range
Advertised Duration 291 int./311 exh.
Advertised Exhaust Duration 311
Advertised Intake Duration 291
Basic Operating RPM Range 2,200-5,900
Brand COMP Cams
Cam Style Hydraulic roller tappet
Camshaft Gear Attachment 3-bolt
Computer-Controlled Compatible No
Duration at 050 inch Lift 235 int./249 exh.
Exhaust Duration at 050 inch Lift 249
Exhaust Valve Lash 0.000 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.509 in.
Grind Number 291THR7
Intake Duration at 050 inch Lift 235
Intake Valve Lash 0.000 in.
Intake Valve Lift with Factory Rocker Arm Ratio 0.522 in.
Lobe Separation (degrees) 107
Part Type Camshafts
Product Line COMP Cams Thumpr Retro-Fit Hydraulic Roller Camshafts
Product Line COMP Cams Thumpr Hydraulic Roller Camshafts
Quantity Sold individually.
Valve Lift with Factory Rocker Arm Ratio 0.522 int./0.509 exh. lift


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