02-19-2020, 11:16 AM | #1 |
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New equal length AA Exhaust?
Just saw this on Instagram the other day. Sounds fantastic for an S55.
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02-19-2020, 11:57 AM | #2 |
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Big discussion on F8X about this here as well. Def sounds great
Equal-length exhaust discussion: new S55 sounds https://f80.bimmerpost.com/forums/sh....php?t=1675268 |
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02-19-2020, 06:49 PM | #5 |
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That wouldn't make any sense... The S55 sound is due to different exhaust lengths, specifically the down pipe lengths. If they use a single mid, then the exhaust flow is no longer separated, therefore eliminating the need for this whole exhaust. The equal length will definitely be a true dual to the back, and there will be some extra length on one side, to make up for the DP differences.
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02-19-2020, 09:10 PM | #6 | |
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Milltek have an M2C version ready for release shortly, here's a clip. Cant wait to get one installed https://www.facebook.com/milltekspor...8613082806282/ |
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02-19-2020, 10:54 PM | #7 | |
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For those interested in how this looks, take a peek at the thread below and note the weird loop near the diff. That is making up for the DP length differences. Not saying that's how AA and Miltek will be addressing it, but just rather one approach. https://f80.bimmerpost.com/forums/sh....php?t=1675268 |
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02-20-2020, 10:52 AM | #8 |
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Check out our current sale by clicking on this link!
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02-22-2020, 01:39 PM | #12 |
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02-22-2020, 02:08 PM | #13 |
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02-22-2020, 04:05 PM | #14 |
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LMFAO, now I've been penned for the first time in my life!
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Commanderwiggin2050.00 Brandt51887.50 |
02-24-2020, 02:03 PM | #15 |
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After following this since last year, I've had my own equal length made up locally.
It really does change the whole sound. Sounds more like my old 335i, which is great. Deeper, rises with revs, hard to describe really. It's a bit too loud for me with valves open, so I programmed them shut in efficient and sport for now. Happy it cost me just £275. Still a work in progress. As it's cheap it leaves cash to experiment a bit more Last edited by doughboy; 02-24-2020 at 02:10 PM.. |
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02-25-2020, 04:43 AM | #16 | |
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02-25-2020, 06:49 AM | #17 | |
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02-25-2020, 01:49 PM | #18 | |
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I'm confused |
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02-25-2020, 01:58 PM | #19 | |
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Pics on their facebook site - https://www.facebook.com/Milltek/pho...type=3&theater https://www.facebook.com/Milltek/pho...type=3&theater |
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02-25-2020, 02:04 PM | #20 |
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OPF back is not the same as cat back for US I thought? OPF is in the place of our secondary cats, so it essentially goes from the brace to the back of the car. A true cat back would replace the secondary cats and/or the OPF stuff, correct?
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02-25-2020, 02:11 PM | #21 |
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This one is from the OPF back. (UK car)
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02-25-2020, 02:19 PM | #22 |
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My understanding is Cat back/OPF exhausts by definition only affect downstream of the emissions equipment. It may delete part of the mid-pipe which includes resonators for example, which is where it differs from an 'axel back' or muffler.
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