Gordon yes they do for most of the racing GM does requires car to function as one on the street.

Its useless though for you tell people that even the 500 HP new Z06 has a MAF and they still rant that VE/SD is best.
Stupid thing is many yank MAF, tune VE and put MAF back on,
WHY because the PCM uses MAF for many functions including the drive by wire but a lot of this stupid shit comes from the Fbody forums which does not have DBW and has no clue how different the Corvette is with its electronics.

If what they claim was true then my '99 should be running like crap and why I used it in this testing to prove it made ZERO performance gains tuning VE.