I got some new J&E pistons today. These are the SRP style which are much lighter than the older style. The 100mm bore gives 1036cc and at 368 grams are about 20 grams lighter than the old style 98mm bore pistons. The top ringland is hard andodized and ground to a tighter spec than before. Less ring flutter, no micro welding, and longer life is the result. This comes from Nascar. They come with a thermal barrier coated crown and dry film skirt coating direct from J&E. I have a extra set.