Well I've decided to sell them since i'll never go back to them since i have cams now.. they will still be plenty good till you get over 315hp though, everything is 2.25" only thing you'd have to find is some gaskets to fit them.. the cats i bought thru jegs less than 4 months ago they were on my truck for about 3 months maybe, thier like brand new and cost me 169.00 each thru jegs and 125.00 labor to make the b-pipes.. If you want them i'll sell them for 250.00 plus shipping