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      12-01-2021, 10:40 AM   #31
BSM n54iS
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Drives: '11 335is | '16 Macan Turbo
Join Date: Aug 2015
Location: Everywhere and Nowhere

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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?
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'11 335is BSM MT "BMW Performance Editon" | '16 Porsche Macan Turbo
GruppeM CF Intake | AR Resonated DP | ER CP | Turbosmart RacePort BOV | Cobb FMIC | RB Inlets | RB External Mishi/Turner OCC | Michelin PS4 | BMW Performance Springs/Bilstein B8 + Dinan & M3 bits | BMW Brembo BBK | BMW Performance CF Spoiler | BMW Performance CF Lip | BMW Performance Alcantara | PS Designs GTS Armrest | AG H6-40 | Rear Seat Delete
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