James, gasket set, cylinder base. 3-5/8" bore. .020" RCM - 63-84 B.T. (excl. Evo) with 3-5/8" big bore cylinders (NU) 589654 This will enable installation of

This will enable installation of regular 1-3/4" diameter mufflers

Big Sucker™ Stage I Air Filter Kit with Synthetic FilterEach hidden breather is o-ringed at the heads and exits at the mouth of the injector/carb to provide efficient engine breathing

Fits: > 83-95 H-D(NU)(EXCL

80-81 FLT REAR)

in the OEM color code

James, gasket set, cylinder base. 3-5/8" bore. .020" RCM - 63-84 B.T. (excl. Evo) with 3-5/8" big bore cylinders (NU) 589654 This will enable installation of3 5 8" big bore. . 022" RCM (Rubber Coated Metal). Final crush . 020". RCM (Rubber Coated Metal) gaskets consists of a . 020" thick stainless spring steel base covered with a . 001" thick heat resistant Viton rubber on both sides. A very strong gasket which requires no re torquing. Gaskets will not become brittle or burn out.