Aftermarket midpipe to OE catback question
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10-19-2012, 10:52 PM
Drives: '11 1M, '99 540i/6, '89 325is
Join Date: Aug 2011
Update: the adapter from Burn Stainless arrived today. I designed the part, sent them the Akra midpipe with a new new graphite sealing gasket, and they fabricated it. As always, their quality was outstanding, with welds that could pass for robotic. Assembly was uneventful, although I'd like to find some springs that will allow me to use the OE flange bolts.
I'll post a sound clip soon, but my initial impression is that cold start, idle, and revving aren't that much louder than stock. Since I haven't actually driven the car, I cannot comment on interior volume at speed or drone yet.
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