You will want to stay clear of these guys, they sent me my new Probe pistons and I check the box and invoice number to ensure they are the correct ones. I drop off my block and bearings and rotating assembly to the machine shop to be balanced. He calls me the next day and says if you are going to run a super charger you dont want these pistons, I say these are the pistons you told me to order. Long story short, they were packaged wrong, I call Skip ( the owner) and now he does not want them back because we pressed the rods on. I told him this is no fualt on my part, he says you should have checked the box against the pistons. I ask him why didnt your company do that then? bottom line is it took me 5 more days to get an exchange and now I have to pay the machine shop again for the work I already paid for. They didnt even offer me a discount or credit after I explained their mistake cost me a $200. I will never buy anything from White performance again, sorry for the rant but this was in no way my fault