I have a aftermarket h pipe that needs to be re-threaded in one of the 02 ports. How much do yall think that will cost and where should I get it done? Also I am thinking about buying the loudmouth mufflers and having them welded in. I know that the SLP system is bolt on only but I think I can weld them in to the stock cat back. I will keep the tips because I like the look. So how much for the threading and for the welding and can the welding be done? Thanks in advance.