I'm a new owner of a 2013 judge and wanted to experiment with some slip on muffler with tips to replace the stock muffs. I have read a ton and can't find what the stock mufflers inlet size is? Magnaflow and a ton of others have nice 3.5-4" round stainless and Black powder coated mufflers with killer tips on them. As much as a pain it seems to be to get the stock muffs off I wanted to have them on hand during surgery. Any help?