I have one chambers/10 series with a mac prochamber and it sounds mean. Its really loud when on the gas , but when you keep off it, its not that bad. The only negative part is that you are losing some back pressure, but I don’t think it is a significant amount. I felt like I picked up some power.
I've heard the 1 chamber with mac longtubes on a modstang with a c-4. I believe the guy had a custom x-pipe too. It was at a car show and I think it turned some heads rolling up into the lot. Sounded good, but loud.
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