That is incorrect ( for these pistons). TRW skirt design is different than many " modern" skirts. Every manufacter specs a different measurement location. TRW happnes to be from the centerline of the pin, down, just below the pin hole. Not the skirt.

If they are a coated TRW, then you go with a given bore dimension,provided by them, not an actual measurement.


RIP Monte Smith

Your work is a reflection of yourself, autograph it with quality.

WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.