02-21-2017, 02:34 PM | #1 |
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M performance exhaust questions
Hi folks, I have a M4 competition on order.
One M performance upgrade I am considering is the M performance exhaust. I would ask my dealer to fit before I pick the car up. Anyone there who has fitted one? If so I have a few questions. I've been looking at the BMW M Performance exhaust system, titanium (£3,000.00) + BMW M Performance tailpipe trim in Titanium (£788.00) Will the parts above completely replace the factory exhaust system? When driving in comfort mode is it louder, too intrusive in the car? I would get it fitted by my dealer & guess that as it's not a remap my warranty will still be valid? Are there any deals going about to buy this? Is there anything else i should take into consideration? My intention is to improve the noise when in sport mode + improve the performance by fitting a free flowing exhaust Thanks for help |
02-21-2017, 04:07 PM | #2 | |
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If you do buy one get it from Phil at Coltswold, £3k inc carbon tips!!
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02-21-2017, 05:23 PM | #3 |
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Efficient mode there is no additional noise or intrusion than standard exhaust.
No improvement in performance from what I understand. My mpg has taken a hammering though (fact) as my driving style changed without a doubt! |
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02-22-2017, 02:31 AM | #4 |
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I had the M Performance exhaust fitted at delivery (along with the carbon tips and diffuser). Having also driven a previous M3 Competition without the MPE for a few months, it certainly does make a difference - but it's all in the noise as opposed to any measurable power gains. It also looks great!
In Comfort, the valves are shut and it's quiet - perfectly civilised. In Sport/ Sport + the noise is as you would expect. Louder (much louder) with more throttle response in Sport +. The harder you push the louder it gets. Red-line it and it's thunderous. But that's what you want with the MPE. Cruising is non-intrusive even at higher speeds. I've never experienced any drone. My only complaint is cold starts. With valves open it's loud, but doesn't sound as good as it should until it settles and warms up. Cold starts in Comfort (default) however is just right - especially for the early mornings... Price-wise, I got mine for around £3k for both exhaust and tips. Hope that helps! H |
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02-22-2017, 03:28 AM | #5 |
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I was quite shocked at how loud the MPE is when we done an exhaust sound-off at our last meet.
For just being a backbox system it has a great sound. I'm mindful there's been quite a few quality issues I've been reading about recently so something to be mindful about perhaps when spending £3k+
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02-22-2017, 05:58 AM | #6 |
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As above, i have the MPE on my M4 non CP, with the CG valve controller, videos are ok but to hear different systems in real time is the best way, i was behind Daz at the last meet and his Milltek on the CP is something else
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02-22-2017, 03:30 PM | #7 | |
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Is the CG valve controller an additional piece of hardware in addition to the MPE? Does this allow you to say choose sport setting with the valve shut? |
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02-22-2017, 05:10 PM | #8 |
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the cg valve controller is a small cost effective electronic box that easily plugs inline with the existing exhaust valve connectors. it can be controlled via the supplied rf remote control. you can order it in whatever modes take your fancy, ie mine is set to automatically open valves when ignition is switched on (even when car is in economy engine map) so car sounds quite throaty all of the time, but when pressing the remote to 'on' it switches my valves to car default setting, so will give quiet startups early doors.
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02-22-2017, 05:41 PM | #9 | |
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One other question. Is the MPE a complete exhaust system.. I.E if I buy BMW M Performance exhaust system, titanium (£3,000.00) + BMW M Performance tailpipe trim in Titanium (£788.00) Will this replace CAT & box and all down pipes? Last edited by spidermack; 02-22-2017 at 06:07 PM.. |
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02-23-2017, 02:49 AM | #10 | |
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I can't wait to hear one in the flesh this weekend! |
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02-23-2017, 02:58 AM | #11 |
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02-23-2017, 04:44 AM | #12 | ||
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So my settings are: (Off Mode = CG VC Default at startup) Off Mode: Flaps Open On Mode: Flaps Default If you wanted ability to completely close valves at will, you would have to decide on: Off Mode: Flaps Open On Mode: Flaps Closed or Off Mode: Flaps Default On Mode: Flaps Closed or if you wanted it to always default to flaps closed, with the requirement to press the key fobs on button to open flaps/or set to car default then: Off Mode: Flaps Closed On Mode: Flaps Open or you could have (if you never wanted to force flaps open in Efficient) Off Mode: Flaps Closed On Mode: Flaps Default choices choices... the cg valve controller is an easy diy fit, around 20 mins... |
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02-23-2017, 06:00 AM | #13 | |
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02-23-2017, 08:04 AM | #14 |
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Pie just to put a financial warning on going to that meet beware it will end up costing you a fortune and unhappy partner, oh well at least we are good at something.
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02-23-2017, 08:06 AM | #15 | |
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I also have a friend working out of the US just now and he is planning a visit to the UK around May time so if it can wait I could ask him to mail order in country and just take them back with him in his luggage. |
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02-23-2017, 10:09 AM | #17 | |
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You cant keep the valves shut all the time in sport+ with the valve controller, as the ECU overides this. |
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02-23-2017, 11:05 AM | #18 | |
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02-23-2017, 11:35 AM | #19 | |
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I would say its a great mod, but i notice you are getting a Comp Pack ?. The Comp Pack exhaust valves are definitely mapped differently to the standard car, and in sport +, the valves are open longer, feels like all the time, but i dont know the exact %tage. On my standard M4, i had the valves open for more effect, all of the time in comfort etc, but with the comp pack i have never used the valve controller at all, even though it is fitted, especially with the MPE. In sport modes, it is just awesome, maybe worth noting ?. |
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02-23-2017, 03:51 PM | #20 |
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Thanks for everyone's help. I have emailed Costwold to get a price for a MPE with Titanium tips. I will also check with my dealer.
One other questions the MPE once fitted do the tips protrude further than bumper? Last edited by spidermack; 02-23-2017 at 05:38 PM.. |
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02-24-2017, 04:17 AM | #21 |
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02-24-2017, 12:42 PM | #22 | |
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