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      12-01-2021, 11:25 AM   #32
Soden82
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Drives: 2011 BMW M3
Join Date: Jun 2017
Location: Boston

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2011 BMW M3  [0.00]
Quote:
Originally Posted by BdSM n54iS View Post
Quote:
Originally Posted by Soden82 View Post
I had the ATM exhaust on for about a year paired to VRSF downpipes. Overall I think it's the best 3.5" system out there. The welds were fantastic, the quality of the piping was outstanding. Even the exhaust clamps they give you are light years better than the ones VRSF provides for their exhausts.

The sound was very deep and very good. Even with the resonator, it was LOUD. There also really wasn't that much drone, except when going uphill or some instances when the resonance hit a certain way. I'd say 85% of the time there was no drone.

The reason I got rid of it for a valved exhaust is that I wanted the best of both worlds. Maybe I'm getting old but I wanted the choice to make the exhaust either quiet or loud at the push of a button. With the valves open it still isn't as loud as the ATM exhaust, probably because the Turner is a 2.5" and the ATM is a 3.5"
I've been thinking, would you be able to make a custom blend of both those exhausts? 3.5" from dp to axle back section, then swap in the turner valved muffler section onto the 3.5 -> 2.5 crossover?
For the best performance I bet you could. I think the best way would be to keep the ATM exhaust and then buy valved mufflers separately and mate them together. The wiring for the valving is the same across all exhausts for this platform
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2009 BMW 335i 6MT
*big single (eventually)*
For now...
MHD tuned
VRSF Race IC
DCI
ATM exhaust
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