KP Big Bore Kits are a premium kit to increase engine displacement. Bore is increased from 83mm to 86mm which will just about turn your 1.5L powerhouse into a 1.6L. Pistons are forged with our premium ring pack, premium head gaskets and a bored out premium Nikasil Cylinder. That’s right! No cast iron sleeves, these are Nikasil. Add extra Horsepower to your race or daily machine! Extra fuel needed. Cylinder core required. N/A Kits have an option to add the appropriate parts to upgrade the fuel system, please check out our bolt on big bore fuel system upgrades.