This kit must be used with 4-1/2 stroke flywheels resulting in 113 displacement. S&S# 91-7111 Drag# NA TR# NA. S&s 113 cylinder & piston kit 4 big bore harley 1984-’99 evo 91-7111 natural all products are warranted against manufacturers defects. Online store We do NOT carry everything in stock but do our best to keep the more popular items in stock.