COMP Cams 91-601-5 Mutha' Thumpr 227/241 Hydraulic Flat Camshaft for Buick 364-425 Nailhead Engines

Classic Mutha' Thumpr 227/241 Hydraulic Flat Cam Buick 364, 401, 425 Nailhead. Street/strip, needs 9:1 compression, 2500+ stall, intake, Gears and headers, very rough idle. High performance street/strip, head modification recommended to raise RPM limit, 2200+ stall, rough idle.

The COMP Cams 91-601-5 Mutha' Thumpr hydraulic flat camshaft is engineered for high-performance street and strip applications on Buick Nailhead engines, including 364, 401, and 425 cubic inch displacements. Designed for enthusiasts seeking increased horsepower and torque, this camshaft features a duration of 227/241 degrees and is optimized for engines with a compression ratio of 9:1 or higher. It requires a stall converter of at least 2500 RPM for optimal performance. The cam's design delivers a rough idle, making it ideal for performance builds that emphasize maximum power output. To achieve the best results, head modifications are recommended to raise the RPM limit, along with upgrades to intake systems, gears, and headers. This ensures the engine can take full advantage of the camshaft's aggressive profile, enhancing both acceleration and overall engine responsiveness.

Fits
Buick Century Base 1957
Buick Century Base 1958
Buick Electra 225 1959
Buick Electra 225 1960
Buick Electra 225 1961
Buick Electra 225 1962
Buick Electra Base 1959
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Buick Electra Custom 1966
Buick Estate Wagon Base 1959
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Buick Gran Sport Base 1965
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Buick Invicta Base 1959
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Buick LeSabre Base 1959
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Buick Limited Base 1958
Buick Riviera Base 1963
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Buick Roadmaster 75 1957
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Buick Skylark Base 1965
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Buick Special Base 1957
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Buick Wildcat Base 1962
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Buick Wildcat Deluxe 1965
Buick Wildcat Gran Sport 1966