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Piston Ring End Gap Chart

Ring End Gap:

Application Top Ring Gap (Min) 2nd Ring Gap (Min) Oil Ring Rail
N/A Street .004" x Bore .005" x Bore Min .015"
N/A Race .0045" x Bore .0055" x Bore Min .015"
Turbo/Supercharged .006" x Bore .006" x Bore Min .015"
Dirt/ATV/Snow .004" x Bore .005" x Bore Min .015"
Nitrous .007" x Bore .0065" x Bore Min .015"
Drag Race .0055" x Bore .006"x Bore Min .015"

Ring end gap should be measured with the ring square in the bore on a fresh hone. Cylinder should be free of any taper.