Piston Rings, Premium Ductile Ring Sets, Plasma-moly, 3.630 in. Bore, 1.2mm, 1.2mm, 2.5mm Thickness, L8, V8, Set of 8 Whether it's a car, truck, motorcycle, marine, or performance racing application—properly sealing the piston to the engine block is a requirement. Hastings premium ductile ring sets do just that, and they're offered in many different options to fit virtually any piston. If the engine you're working on is blowing smoke, using excessive oil, or at a loss for power, it may be time for new rings. These premium ductile piston ring sets are great for rebuilds or new builds, daily drivers or performance vehicles. Order the sizes needed for your project. Bore (in.): 3.630 in. Bore (mm): 92.200mm Piston and Ring Oversize (in.): Standard Piston and Ring Oversize (mm): Standard File Fit: No Gapless: No Gas Ported: No Top Ring Included: Yes Top Ring Thickness: 1.2mm Top Ring Material: Steel Top Ring Facing Material: Plasma-moly Second Ring Included: Yes Second Ring Thickness: 1.2mm Second Ring Material: Iron Second Ring Facing Material: Phosphate coated Oil Ring Included: Yes Oil Ring Thickness: 2.5mm Oil Ring Material: Stainless steel Quantity: Sold as a set of 8.