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Originally Posted by Orange97GTVert
Flowmasters sound great on 5.0s, get the 40 series catback with the polished stainless steel tips. There is nothing better for just catback.
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There are several aftermarket exhaust companies that make catback systems that make more power than the Flowmaster & IMO sound much better, and not as loud.
I recently ditched my 2 chamber Flowmasters for the DynoMax super turbo 2.5" catback ssystem. I have an offroad h-pipe so I opted for the DynoMax Super Turbo mufflers as opposed to the DynoMax Ultra Flos. The Super Turbos are much quieter than my old 2-chamber Flowmasters. I picked more power with the DynoMax system too. I haven't dynoed it but I picked up a little more than a tenth of a second in the quarter mile. If you have your catalytic converters in still I'd get the UltraFlos. If you have an offroad h-pipe I get the Super Turbos so that you can still hear yourself think.