Big Bore Kit
Increase the overall power of your Indian Thunderstroke with our 121-126-131" Big Bore Kits. Designed with high quality ductile iron sleeves and lightweight ArmorGlide Skirt Coated forged pistons to give the best power and reliability.

Increase the overall power of your Indian Thunderstroke with our 121-126-131" Big Bore Kits. Designed with high quality ductile iron sleeves and lightweight ArmorGlide Skirt Coated forged pistons to give the best power and reliability.