0.030in. Head Gaskets - 3.927/3.937in. Bore. Fits Air & Water Cooled Twin Cam Engines with S&S 97ci, 98ci, 106ci or 107ci Big Bore Kits.

Features & Benefits:-

* Fits 3-7/8", 3.927" & 3.937" Bore.

* Provides an additional .2 bump in compression.

* Sold as a Pair.

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