ohhh gotcha, thats why its a 100 bucks more, I think im going to order the no tune required PMAS intake today, I'll take another 20whp with no tune changes needed.The one that doesn't need a tune has a recalibrated MAF sensor that is plug and play. I'm not sure if it comes with the recalibrated MAF or if you have to send yours in to be recalibrated.