any exhaust shop sells tips, WELD ON ONES, not shitty screw down at your local
walmart/pep boys/autozone

gutting the cats is easy, it takes just alot of patience and free time, just get
something sharpish and chizzle away

also like I said I'm not 100% but I believe gutting the cats on your car will cause the
post-CAT o2's to read funny since the exhaust will be much richer with hollow cats