I have a set of headers that I received with my engine that have a 3 inch collector flange, but the flange connection to the exhaust system straight pipe is 2.5 inch. Before I go buy a new set of headers, can anyone point me to a solution that will adapt the two? I have found a few things that would involve cutting and welding to make it work, which I am not interested in doing, I would rather just buy a new set of headers in that case.