Quote:
Originally Posted by Phat_R
Also change the MAF sensors if they haven't been changed in the last 5 years -- you will notice a SIGNIFICANT power increase
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IMO, do NOT buy new MAFs. Recently, companies have been releasing MAFless tunes which end up being only slightly more expensive than replacing MAFs, but it's permanent, and you can a slight power boost, smoother idle, sport button memory, etc, etc.
You might have to also relocate your IATS, but it shouldn't be expensive or hard.
Powerchip has their tune on special right now for M5board.com members:
Powerchip's MAF'less tune! - The Unofficial BMW M5 Messageboard (m5board.com)
GB price expires Aug. 15th. I'm ordering today or tomorrow.