COMP Cams 91-602-5 Big Mutha' Thumpr 227/241 Hydraulic Flat Cam for Buick 364-425 Nailhead Engines

Classic Big Mutha' Thumpr 227/241 Hydraulic Flat Cam Buick 364, 401, 425 Nailhead. Street/strip needs 9.5:1 compression, 2800+ stall, intake, Gears and headers, very rough idle. Street/strip, must have head modification, 2500+ stall, very rough idle.

The COMP Cams Big Mutha' Thumpr 227/241 hydraulic flat camshaft (Part Number 91-602-5) is designed for high-performance street and strip applications on Buick Nailhead engines ranging from 364 to 425 cubic inches. Crafted to deliver aggressive performance, this camshaft features a street/strip grind that requires modifications to the cylinder head for optimal operation. It is ideal for engines with a compression ratio of around 9.5:1 and a stall converter of 2800 RPM or higher, making it perfect for enthusiasts seeking significant power gains and a rough idle character. The cam's specifications include a duration of 227 and 241 degrees, providing a substantial increase in airflow and engine output, especially when paired with aftermarket intake, gears, and headers. This camshaft is not carb-approved and requires acknowledgment of this condition before installation, ensuring proper compliance with regulations and installation procedures. Designed specifically for 1965 and 1966 Buick Skylark, Electra, Riviera, and Wildcat models, it offers a straightforward upgrade path for those looking to enhance their engine's performance with a reliable, high-quality component from COMP Cams.

Features:

• Designed for Buick Nailhead engines from 364 to 425 cubic inches

• Hydraulic flat camshaft with 227/241 duration for aggressive performance

• Requires head modification for optimal performance

• Suitable for street/strip applications with 9.5:1 compression ratio

• Ideal for engines with 2800+ RPM stall converter

• Requires acknowledgment of non-carb approval and installation considerations

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
Buick Electra Base 1960
Buick Electra Base 1961
Buick Electra Base 1962
Buick Electra Base 1963
Buick Electra Base 1964
Buick Electra Base 1965
Buick Electra Base 1966
Buick Electra Custom 1966
Buick Estate Wagon Base 1959
Buick Estate Wagon Base 1960
Buick Estate Wagon Base 1961
Buick Estate Wagon Base 1962
Buick Estate Wagon Base 1963
Buick Estate Wagon Base 1964
Buick Gran Sport Base 1965
Buick Gran Sport Base 1966
Buick Invicta Base 1959
Buick Invicta Base 1960
Buick Invicta Base 1961
Buick Invicta Base 1962
Buick Invicta Base 1963
Buick LeSabre Base 1959
Buick LeSabre Base 1960
Buick LeSabre Base 1961
Buick LeSabre Base 1962
Buick LeSabre Base 1963
Buick LeSabre Base 1964
Buick Limited Base 1958
Buick Riviera Base 1963
Buick Riviera Base 1964
Buick Riviera Base 1965
Buick Riviera Base 1966
Buick Riviera Gran Sport 1965
Buick Riviera Gran Sport 1966
Buick Roadmaster 75 1957
Buick Roadmaster Base 1957
Buick Roadmaster Base 1958
Buick Skylark Base 1965
Buick Skylark Base 1966
Buick Special Base 1957
Buick Special Base 1958
Buick Super Base 1957
Buick Super Base 1958
Buick Wildcat Base 1962
Buick Wildcat Base 1963
Buick Wildcat Base 1964
Buick Wildcat Base 1965
Buick Wildcat Base 1966
Buick Wildcat Custom 1965
Buick Wildcat Custom 1966
Buick Wildcat Deluxe 1965
Buick Wildcat Gran Sport 1966