Quote:
Originally Posted by neil_b
Thanks Jay! Richard is running the 987 airbox but has kept the MAF and housing from the original airbox to try to avoid any ECU problems.
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Neil,
Retaining the 987 MAF housing could itself can cause ECU issues as the diameter is larger than the 986 housing iirc. I have heard, stories where the ECU may adapt but I tend to take these with a grain. Unless your friends custom tune is geared for a larger diameter, he will likely get mixture issues.