I've been tossing around the idea of ordering some high flow cats for my truck, probally some Magnaflows. I saw Troyer had quite a few in various sizes and one supplied with air and one without. My understand is we don't need the one with the air supplied, correct? Im running true duals right now with Flowmaster 40s.

Does anyone have them and what do you think?

I was also tossing around the idea of dumping my Flowmaster 40s and getting two 'small' Magnaflow mufflers instead. I just really don't want to lose sound quality. Do you think it'd sound good/better than my current set-up?

 

I think that it is hard to beat Flowmasters for sound quality. The 40 series are generally very loud but sound great. I've heard that magnaflow is better performing than flowmaster due to the multiple chambers found in flowmaster mufflers. I've also heard quite a few people around here say that magnaflows are quiter than flowmasters.