I purchased this exhaust system from John Bozak / jrfreestyle that was displayed to be used but in excellent good running condition. After receiving the item and looking at the header pipe I noticed it had been heavily ground and modified in the mounting holes where they were ground out twice the diameter of the original mounting holes and the water jackets at “some point” have been fIlled with an epoxy and then ground again. Upon receiving I had noticed a lot of grinding shavings inside and all over this item also. I took photographs and sent them to him questioning these flaws in the item. He immediately offers for me to return the items for a full refund if I was not happy I agreed to this! and offered to pay the return shipping!! A day or two later he retracts his offers and completely ignores settling this poor transaction.