Cometic, cylinder base gasket set for construction. 3-1/2" copper

Standard 3-1/2" hole. With 'type A' style gaskets.
Includes two of each in thicknesses of .005", .010", .015" and .020".
These are special copper base gaskets for mechanics who want to achieve a specific compression ratio.
Explanation of the type A gasket: The 'type A' gasket is the old type introduced on the 1984 Evolution Big Twin models, and can be used on all 84-99 Evo Big Twin models, following the cylinder base contours perfectly. They will fit 86-22 Evo XLs, but will protrude at the cylinder base. Both 'type A' and 'type B' gaskets have identical bore diameter, oil hole and bolt hole locations. The gaskets for the front and rear cylinders are identical. The only difference between 'A' and 'B' gaskets is the outer perimeter.


Specifications


Brand
Cometic


Application
84-99 Evo Big Twin (NU)


Material
Copper


Diameter
3.5 inch


Packaging weight
0.13 kg


HS Code
84849000


Motorcycle family
BIG TWIN, DYNA, FX, FXR, SOFTAIL, TOURING


Original name
Cometic, builders cylinder base gasket set. 3-1/2" copper