In case anyone is interested in another option, I'm going to be working with Jack from Custom Performance Innovations in the next few weeks on a midpipe. My plan is to incorporate 200 cell cats and probably AR20s. I'm told cost will be sub-$1k, it's similar to a midpipe he makes for E46 M3s already. In the next few days I hope to get the car up in the air and take some measurements for him. If I have to, I'll pull the pipe out entirely and run it up to his shop, he's about 1h15min from me. If anybody is interested in waiting to see what we come up with, I think the plan, from my very preliminary communication with him, is that he will have a jig as a result of this so he can make more in the future that are Z4M specific.
FYI
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Silbergrau A08 / Sepang Brown LSD6 / Carbon Leather 4MY (1 of 3, this combo)
RAC RG63 | Conti EC-DW | GC/Koni-Dinan | Rogue RSM | Arqray | Autosolutions | BMW brace | Pinnacle tint
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