So seller didn't know what he was selling and just assumed it was a PE exhaust and sold it anyways. Buyer got it installed it and took his word and it ended up not being the exhaust he paid for... Seller refunded his money back and all is well....
So basically you sold the item not knowing 100 percent if it was a PE exhaust....
Rep ruined....nope but highly questionable now. I knew I was not wrong and im glad I agreed with OP.
Moral of the dilemma is know what your getting and always send it through paypal and not as a gift. Have documented proof of the product.
OP had to pay for the install and his time... he has part blame as well not knowing what to look for to confirm its the right product. Never trust anyone and double check what your getting.