Fitments
84-99 Evo Big Twin with 3-5/8" big bore cylinders (NU). 99 FXSTB Night Train; 98 FLTRI Road Glide; 98 FLTR Road Glide; 98 FLHRCI Road King Classic; 97-99 FLSTS Heritage Springer; 96-98 FLHTCI Electra Glide Classic; 96-97 FLHRI Road King; 96 FLTCUI Tour Glide Ultra Classic; 95-98 FXD Dyna Super Glide; 95-98 FLHTCUI Electra Glide Ultra Classic; 95-97 FXSTSB Bad Boy; 94-98 FXDS-Conv Dyna Convertible; 94-98 FLHR Road King; 94-96 FLSTN Heritage Softail Special; 93-98 FXDWG Dyna Wide Glide; 93-98 FXDL Dyna Low Rider; 93 FLSTN Heritage Softail Nostalgia; 92 FXDC Super Glide Custom; 92 FXDB-D Dyna Glide Daytona; 91 FXDB-S Dyna Glide Sturgis; 90-99 FLSTF Fat Boy; 90-93 FXRS-Conv Low Rider Sport Convertible; 89-97 FLHTCU Electra Glide Ultra Classic;89-95 FLTCU Tour Glide Ultra Classic; 88-99 FXSTS Springer Softail; 88-99 FLSTC Heritage Softail Classic; 86-99 FXSTC Softail Custom; 86-98 FLHT Electra Glide Standard; 86-94 FXR Super Glide II; 86-93 FXRS-speed Low Rider Sport; 86-90 FLST Heritage Softail; 86 FXRD Sport Glide Grand Touring; 85-87 FXRC Low Rider Chrome
Part Description
Athena, Evo cyl. head & base gasket kit. 3-5/8"
3-5/8" big bore. Kit to service one engine. Includes Blue PTFE coated head gaskets and 'type A' fiber reinforced paper base gaskets. Includes oil return O-rings. Type 'A' (early style) and type 'B' (late style) gaskets explained: There are 2 types of cylinder base gaskets for Evolution models available. For convenience sake we'll call them 'type A' (early) and 'type B' (late). *Type A' gasket was introduced on the 1984 Evolution Big Twin models, and can be used on all of the 84-99 1340cc Evo models and will follow the contours of the cylinder base perfectly. They will fit 86-22 Evo XL, but stick out at the cylinder base. This can be a problem with silicone beaded base gaskets. *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. Both type 'A' and type 'B' have identical inner bore diameter, oil hole and stud hole locations. Gaskets for front & rear cylinder are identical. Only difference between the 'A' & 'B' gaskets is the outside perimeter.
