bleh, high flo cats suck hardcore...i barly had mine 5 months on my lude 99 SH and its already detereorating..makes a funny BZZZZZZZZZZZT at 3.8k-4.6k rpm...highflo cats may be highflo but usualy not made worth CRAP...dont bother puttin race gas in it...you might superheat it..and break it....dont buy random tech!....imma hollow the new one out now, screw what you guys say..its the best way to go...