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Back in stock. Mopar LA 273 318 340 360 P5249320 premium upgrade gasket set and HIGHFLOW factory looking head LONG style bolt. There are two different lengths of bolts for the adapters. Check before ordering. If unsure of which one you need, just ask. This bolt replaces the original LONG style bolt that has an overall length of 3.38 inches and a shank length of 2.94 inches. Just swapping out the bolt from the factory original will give 9% better flow and is made of 4140 prehard steel, stronger than originals and tested to 100 ft. lbs of torque. Listing is for (1) bolt, (1) tried and true Felpro 70522 gasket, (1) AMS 1964 Mil Spec. cork gasket that has a working temperature of -30°F to 285°F and has a fiber mesh that will not split or fragment like the originals and (1) AMS 1976 dead soft oversized copper washer gasket, REUSABLE .Torque to 40 FT lbs.