Vortek Vac-Seal 25 adapter
Includes a Vac-Seal 25-Moly-Core piston seal

Leather Seal Replacement threads direct into the piston head. The thread size is commonly an M5 x 0.8 in most Leather Seal arrangements. However, if the thread size is different from the one we supply, the OEM screw that is currently in the Leather Seal may be put through the hole of the seal retainer and used. Either way, there is now an option to use synthetic, Moly Core seal to greatly improve damping-shot cycle and velocity performance.