im gonna make my own personly outa 2.5 mandrel bent stainless steal using a flowmaster 40 series cat with dual 2.5 outs making a custom dual exhaust with hi perfoamnce mufflers havent decided with what company i wann go with yet with dual 2.5 outs for tips n for tis im gonna use these tips that have a trap gate that stays close durin low power range n opens up in the high power range so u get all the hi end power of a bigger exhaust with out loosin the low end