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I just put the Flowmaster American Thunder system on my C6.I like the way it looks and sounds.The smaller(than stock) Delta 50 mufflers in flat black and the 2-4" tips to my eye make the rear of the car look a lot trimmer.The way it looks and sounds,I will probably leave it on as long as I own the car as it has the perfect note,and to my ears no significant resonance.I think Flowmaster did their homework on this one.My car has an MN6.I didn't notice them being significantly heavier than stock,and may be somewhat lighter.
Last edited by BlackMark; Apr 27, 2006 at 08:15 PM.
I love my Calloway Double D catback/and the looks are VERY muscular looking.Great idle sound,no renasonce inside;and wot sounds like a Vette should! Quality is outstanding.