Wiseco +0.020 " piston kit, Buell tube thunderstorm heads
Buell S1 1998
Buell X1, M2 and S3 2000 -up
and all models with the Thunderstorm heads mounted
kit contains 2 forged pistons, 2 piston pins , 4 piston pin clips and Hastings piston rings
cylinders need to be bored and honed to size !!