Top End Gasket Kit. Fits Twin Cam 1999-2017 with 98 or 107ci, 3.937in. Big Bore Cylinders (0.030in.)

Features & Benefits:-

* Fits 3.927" & 3.937" Bore.

* Includes 0.030" Head Gasket

* Provides an additional .2 bump in compression.

Tech Tips:-

* Remember to check your clearances.

* Will Not Fit Stage 6 S&S Kits.

* Use of these head gaskets without proper clearance checks can lead to catastrophic engine failure.

NOTE: TWIN COOLED HEAD GASKETS WILL RETRO TO AIR COOLED HEADS & CYLINDERS