08-25-2012, 07:49 PM | #45 | |
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When cracking open the throttle on the N55 it sounds better than my N54 135i, plus the intake roar at WFO on the N55 is sweet too. The performance exhaust sounds louder and better than my 135i N54, and more so when you open up the throttle. Idle sounds deeper with the N55 and sport exhaust vs the N54 135i. I can't speak to a 135i w/N54 or N55 with sport exhaust, as I have no experience with hearing either one, other than youtube. But, real life is a much different experience compared to youtube video with exhaust sounds coming from a .5" to 1" speaker. It just can reproduce the real tone and subtlety that your ears can discern. I think you'll be very pleasantly surprised. |
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08-26-2012, 01:14 PM | #46 | |
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08-26-2012, 06:45 PM | #47 |
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13MB file won't upload due to forum rules.
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08-26-2012, 06:54 PM | #48 |
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08-26-2012, 06:59 PM | #49 |
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No. Ugh. Too many accounts and too many passwords to remember and too much spam coming in.
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08-28-2012, 01:13 AM | #50 | |
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Why are you guys worrying about keeping the flap open? If you unplug the actuator does the flap stay closed? On our 328i (stock exhaust) I just unplugged the actuator and the valve was open, done deal. |
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08-28-2012, 11:26 AM | #51 | |
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if you unplug the actuator the flap will flap around.
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08-28-2012, 01:56 PM | #52 |
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Nope. Unplugging the actuator will just prevent it from getting an electrical signal. Mechanically, it will still hold the flap closed. Basically, if you unplug the actuator, it will remain closed. If you remove the actuator clip/spring (whatever you want to call it) then the flap will flap around angrier than a marble in a Coke can.
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08-28-2012, 02:02 PM | #53 | |
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09-01-2012, 01:42 PM | #54 |
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Ok that's what I wanted to know. On the previous generation cars, the 1 and 3 series would have their flap open if you unplugged the actuator but the 5 series' flap would be closed, similar to these new cars if I'm remembering right.
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09-13-2012, 09:58 PM | #56 |
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No one's dyno'd it to compare. I didn't see/feel any improvements. But I only tried it around the block and then put it back to stock. There's no harm in doing it, so why not just try it?
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09-13-2012, 10:54 PM | #57 | |
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09-13-2012, 10:58 PM | #58 |
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the price is $1335 installed. but only $935 goes into my lease.
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09-14-2012, 04:19 PM | #59 |
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09-30-2012, 04:10 AM | #61 |
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Is there a big difference in sound between the stock exhaust and the M exhaust?
Currently Im having the stock exhaust but considering going for the M exhaust or another brand with louder & better sound. |
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10-01-2012, 09:56 AM | #62 | |
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this is very simple to answer. Under Dyno Conditions the flap is open. so wiring it open all the time makes no difference. There is one reason for this "mod" - to increase the volume of music your engine produces. There's threads on here w/ sound clips. the M exhaust isn't going to be as loud as aftermarket....but it's noticeably louder than OEM
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10-05-2012, 09:42 PM | #64 |
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M Performance = 80mm. No idea on the size of the stock tips.
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10-05-2012, 10:18 PM | #65 |
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my guess would be stock is 65-70mm
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10-17-2012, 07:17 PM | #66 |
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has anyone noticed better performance over the stock exhaust? I want to know if the M performance has decent gains. If it does Ill pull the trigger and if not Id have to wait for Dinan or something else.
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