0.030in. Head Gaskets. Fits Big Twin 1984-1999 & 1200cc Sportster 1988-2021 with 3.50in. Bore.

* Harley-Davidson Evolution Big Twin 3.500" MLS Head Gaskets.

* Fits Big Twin 80ci '1984-1999 & XL1200cc 1988-2021

* MLS 0.030" thick Head Gaskets (thinner than OEM)

* Provides an additional increase in compression.

** Remember to check your clearances.

* Replaces OEM # 16770-84

Warning : Use of these head gaskets without proper clearance checks can lead to catastrophic engine failure