Actually,
I have seen some documented changes in NA mods. These are not huge gains. My son says he notices a big difference in highway throttle responce...... Perhaps due to cooler -- out of engine compartment air -- The rubber trumpet had been removed when a K&N was added (before the CAI).... There is a definite improvement with hte CAI, again SOP--------
As for the Cobra -- DEFINITE CHANGES!!!
