.022" thick RCM (Rubber Covered Metal). Final crush .020". With silicone bead. Type 'B'. No torque loss as with paper gaskets. Gaskets will not become brittle or burn out. Note: The Type B' gasket was introduced on Evolution XL Sportster models in 1986, and will fit all Evo XL models, but also all 84-99 Evo 1340cc models although the Big Twin cylinder base is a bit larger than the gasket. The 'type B' is the only gasket type that 'The Factory' supplied from 1986 onwards for both Evo Big Twin and Evo XL Sportster models.
Fits: > 84-99 B.T.(excl. Twin Cam); 86-22 XL (excl. 08-12 XR1200) (NU)