This wrinkle black 3 7/8 bore cylinder set for 103", 1999-16 big twins is 4.937" in length and is bored slightly under nominal size and are not honed.
S&S 3-7/8" pistons for 103" kits are machined to such close tolerances that it is not necessary to measure the piston. Additionally, the low friction coating on the piston skirt
makes taking measurements very difficult. Therefore, hone cylinders to nominal diameter +/- 0.0001" for correct clearance.