Making Automotive Dreams a Reality. Mitsubishi Eclipse / Talon DSM. Mitsubishi Evo 8 / 9. Subaru BRZ / FR-S / GT-86. This listing includes: 1 X COMETIC Honda/Acura 1 X ARP HEAD STUD KIT. Cometic Head Gasket: #C4238-030 Bore Size: 81mm Thickness. Questions about this item? International Buyers – Please Note. We welcome your inquiry!