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      12-09-2019, 03:22 PM   #6
ryansbmw
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Drives: 2013 X5 35i M-Sport, 2010 535x
Join Date: Jun 2017
Location: NJ

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Quote:
Originally Posted by Nkponder View Post
You may also want to look into a new intercooler, not sure what size the 50i has. I did the MHD tune on my 35i and noticed a bit of hesitation under acceleration, kinda like it was misfiring. So I added a Wagner intercooler, and smooth acceleration after that.

Downpipes are good too, I installed an AR Designs sport cat in my 35i. My thought was a sport cat would be a good compromise with performance and emissions, but I'm not sure how much it helps with emissions- I definitely have more exhaust odor than I was expecting. So you might as well go straight DP, significantly cheaper, just make sure to get ones with resonators.

Good luck!
How was the sound with the DP? Is that why you suggest the resonators?
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