Total Seal Gapless Piston Ring Sets! Increase combustion efficiency by reducing blow by. This listing is for a full set to cover all 8 cylinders, featuring gapless 2nd rings. Conventional style rings when newly installed will show leak down figures of 7% or higher. These figures can quickly exceed 20% or higher after a surprisingly short period of time. Gapless® rings, on the other hand, typically show leak down figures of 2% and lower and will remain the same throughout the life of the engine. Top and 2nd rings are crafted from Martenstic Ductile Iron, the highest strength iron available, specially heat treated and coated with CrN (Chromium Nitride is a chemical compound of chromium and nitrogen with the formula CrN. It is very hard, and is extremely resistant to corrosion) for lasting durability and reduced wear. Gapless® Second Ring – Patented Total Seal Gapless® design keeps fuel out of the oil and reduces turbo lag. This is the ring of choice for high performance or high eficiency applications. Order the correct set based on your final bore size once all machine work has been completed because these are NOT returnable. Description Plasma-moly, 4.055 in. Bore, 3.0mm, 2.0mm, 4.0mm Thickness, V8, Set Plasma-moly, 4.085 in. Bore, 3.0mm, 2.0mm, 4.0mm Thickness, V8, Set Plasma-moly, 4.075 in. Bore, 3.0mm, 2.0mm, 4.0mm Thickness, V8, Set Bore (in.) 4.055 in. 4.085 in. 4.075 in. Bore (mm) 102.997mm 103.759mm 103.505mm Gapless YES YES YES Gas Ported No No No Oil Ring Included Yes Yes Yes Oil Ring Tension Standard Standard Standard Oil Ring Thickness 4.0mm 4.0mm 4.0mm Quantity Sold as a set. Sold as a set. Sold as a set. Second Ring Facing Material Iron Iron Iron Second Ring Included Yes Yes Yes Second Ring Material Ductile iron Ductile iron Ductile iron Second Ring Thickness 2.0mm 2.0mm 2.0mm Top Ring Facing Material Plasma-moly Plasma-moly Plasma-moly Top Ring Included Yes Yes Yes Top Ring Material Ductile iron Ductile iron Ductile iron Top Ring Thickness 3.0mm 3.0mm 3.0mm
