piston to wall measurement

Clearance is total, not per side. I ran KB Hyper recommended clearance, .002" pistons, .026" top ring, .016" second, on a 4.030" piston, and no problems running 36 hour endurance races. Believe me, those really test a motor, full throttle, up and down the gears, for 36 hours, with the only break being for gas and driver change. The set comes with spiral locks for use if the rods are floating. If they are press pins, the piston and pin is the same. One just heats the rods, and slips the pin in, and you don't use the locks.