987 Airbox and 74mm TB: MAF and tune issue

[dlud]

Thanks! That's a short 90 at the TB. I assume you reduced the size of a more normal sized 90 by cutting each end back. Is the 90 a 3.25 OD? How is the airbox coupler held in?

I recognize that I'm really late to the game on the whole 987 airbox issue (recently acquired a 2000 S) but I wonder why folks haven't used the oem 986 maf, the 987 maf holder and just inserted a 3.25 OD/3.0 ID sleeve into the 987 maf, cutting a hole in the sleeve for the 986 maf (thereby avoiding the issues of a new tune and the marrying of the 986 and 987 maf holders). I thought I saw a mention in a thread somewhere of that possibility but haven't seen any further indications that anyone has pursued it. I haven't pulled out my 986 airbox yet to measure the internal dimensions of the maf holder. Perhaps it's not a consistent 3.0 ID (?).