Cometic, cylinder base gasket. .020" copper 3-5/8" bore - 84-99 Evo B.T. with 3-5/8 big bore cylinders (NU) 537273 Measured overall

Measured overall

- With PX43t base

Mount on left or right side and include mounting hardware

Rib neck band

Cometic, cylinder base gasket. .020" copper 3-5/8" bore - 84-99 Evo B.T. with 3-5/8 big bore cylinders (NU) 537273 Measured overall'Type A' gasket. 3 5 8" big bore copper gasket. Type A gasket explained: The 'Type A' gasket is the early type introduced on the 1984 Evolution Big Twin models, and can be used on all of the 84 99 Evo Big Twin models and will follow the contoures of the cylinder base perfectly. They will fit 86 22 Evo XL, but stick out at the cylinder base. Both type 'A' and type 'B' have identical inner bore diameter, oil hole and stud hole locations. Gaskets for