Dualing a 4.2 V6
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I have the 15609 Magnaflow 3-inch si/so and it sounds good to me on my V6. I feel that it gained power somewhat through out the rpm range. Being Magnaflow designed this system and some people claim performance wise it is the best, I would say 3-inch duals would be way to big. I would probably look for 2-inch pipe as being the best to keep performance and add 3-inch diameter tips. From all the research I have done (V6 wise) Magnaflow and Borla are the top two picks. I think this is due to their straight through designed muffler and that is probably what I would look for if I was you. Good luck!
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