I had three N/As before I jumped over to the SRT world. I did tune (Eurocharged) and put single intakes (Needswings) on two of them. You will definitely notice an increase in low-end torque and should notice a .5 second decrease in your 1/4 mile times at sea level. For the N/A's, I would not bother spending extra for a dual intake. A 74mm throttle body would be beneficial.