.060" thick AFM (Aluminum Foamet Material). For 5-speed models. OEM replacement reference 60539-89 60539-89A 60539-89B 60539-94 60539-94A 60539-94B. Cometics AFM gaskets have an aluminum core with a chemically blown compounded nitrile synthetic thin foam-like rubber layer bonded to both sides. Temperature resistant to over 250 (122). AFM rubber has a 85% recovery while maintaining strong torque retention. Re-torqueing gasket sealers or silicone beads are not required. 89-06 Softail 91-05 Dyna (NU)