well i took mine to the exhuast shop today and it seems they will be able to modify it, i dont really wanna drive all the way out to the switch to get it, if it was the wrong sized flange type, that is the problem i have now, the dump pipe is a 3" dump pipe, and the front pipe is 3" on the cat end and it goes down th 2 1/2 " on the dump pipe end, bcoz its designed to fit up to the standard dump pipe not an after market one.