Home / Engine & Performance / Motor / 3/8 X .750″ 12pt header bolt kit “ARP Porsche 911 AC 3.6L & 3.8L crankcase thru bolt kit” has been added to your cart. View cart 3/8 X .750″ 12pt header bolt kit€ 26,70 3/8 X .750" 12pt header bolt kit quantity Add to cart SKU: ARP-100-1207 Categories: Bolts & Studs, Motor Brand: ARP Description Description Country of Origin: USA Related products Bolts & StudsEngine & Performance ARP GM DURAMAX 6.6L L5P CA625+ HEAD STUD KIT Bolts & StudsEngine & Performance ARP cabinet with SS hex accessory bolts Bolts & StudsEngine & Performance ARP cabinet with black hex accessory bolts Bolts & StudsEngine & Performance ARP Dodge Cummins 5.9L 24V (all same length studs) HSK