Quote:
Originally Posted by TunaMelt
Isn't the diameter the same on the RF hence no tune required? My understanding is that the tune has always been to correct and true the air flow reading of the MAF since it's inserted in a piece instead of having its own plastic tube housing.
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The diameter is not the only thing that affects airflow over the MAF. Yes the diameter being the same is important, but if the air is turbulent over the MAF then the fueling will be way off. If you look at the quality intakes you will see fins before the MAF to straighten the air out and keep it consistent.
If it were as easy as just the diameter, one could just pick up some PVC from Homedepot and cheapo filter from jeggs and have a CAI for under $75.