So I have a cheap ebay exhaust thats done pretty well. But I want to replace the muffler with something better and a little more subtle. I'm looking at the flowmaster 44 series.

I see that the references say to weld it onto the exhaust and it should be cheap. But just incase is too expensive, is there an alternative? I see connectors and fittings for exhaust. Is welding the best option or are there just as effective methods?

Also, the exhaust is 2.5", Im think about getting the flowmaster 9425452. Thats a 2.5" inlet and two 2.25" outlets. Would that provide enough flow for my exhaust and at the same time give a good sound?