98" Big Bore Kits / '99-06 Twin Cam

No Shipping to CA 98 KIT FOR 99-06 TWIN CAM 3 15/16 BORE; 4" STROKE; 10.3:1cr DOMED PISTONS (WITH 86cc HEADS) Aerospace-grade all-aluminum cylinder with nickel-silicon-carbide (NSC) electroplated bore NSC-plated cylinders have less friction for increased horsepower, lower engine temperatures and a longer lifespan Includes pair of all-aluminum NSC-coated bore cylinders, custom-forged pistons with high-tension rings specifically designed for NSC cylinders and a head/base gasket set Replacement gasket sets available separately Upgraded cylinders studs and head bolts recommended Made in the USA Monster big bore kit requires case boring. No sleeving allows for larger bore sizes.