04-09-2018, 05:17 PM | #24 | |
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04-11-2018, 11:52 PM | #25 |
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I have catless, straight-through 3" with a custom setup I made for the rear which is free-flowing, but kills the 1280rpm drone you get with a muffler-delete (using Helmholtz principles). Loudness is directly related to throttle, so lifting decreases volume considerably, and barks/pops are only on demand/shifting behaviour.
Depending on which fuel I'm using at the time, the smell can be quite strong, and only really noticeable on cold start when the wind is blowing exhaust back towards the car. Running a higher ethanol mix reduces the noxious smell (everyone likes corn).
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04-15-2018, 04:04 PM | #26 |
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With either catted or catless the fumes should not be coming into the cabin. I would have it checked for a leak.
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_____________________________________ 2021 X6M Competition, 2021 Audi SQ5 Technik, 2013 Audi S4 |
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04-17-2018, 09:46 AM | #27 |
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Drives: '21 X5MC - Marina Bay Blue
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04-25-2018, 01:16 PM | #28 | |
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Garage List 2010 M5 [9.67]
2016 BMW 340xi M Sport [9.50] 2019 X5 50i M Sport [8.17] 2010 535xi [10.00] 2013 M5 [10.00] 2012 X5 M [10.00] |
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Note, I ask for the reason that I have a 2010 535xi that I want to toy around with,...I've added an MHD tune,...and I know Catless DPs,...a larger IC and free'er exhaust will allow me to go to their Stage 2 Tune. But! I have to pass emissions every 2 years! So, I was thinking about adding Catless DPs and a much larger CAT down the line. Note, I know this is the X5M board,...but the concept is the same! TIA...
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06-24-2018, 11:25 PM | #29 | |
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06-25-2018, 09:17 AM | #30 | |
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Is anyone running catless downpipes with stock exhaust? Would this setup alleviate the fumes and keep the noise and drone at bay? |
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06-25-2018, 12:29 PM | #31 | ||
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