If you hurry you can get in on the Needswings Intake group buy. It's a single and he has dyno sheets to prove the gain. I only use numbers I run at the track, and it dropped my 1/4 mile time by .5 tenths of a second. That's huge, and it's an SRT6. Not sure how much time a N/A will yield. If you search back thread for CAI, someone did measure the flow of a single and double and found that the single exceeded the max air the SRT6 could handle. So double wouldn't help even if it had more air flow. Most double CAI don't pass through to the front just behind the grill and actually provide fresh air. Do a search and you will find lots of answers. good luck.