Either way when I had it on I couldn't tell. I gues you would have to dyno it to know and beings such a small part I doubt it ever made any difference. I think Dodge had a lot of things pretty well figured out. I think the two 3" filters let the engine have all the air thats required. I currently run the K&N setup. I have heard from X-Metal that removing the oil from the K&N will give you more power. It seems pointless to me. The RSI was just nice looking piece and well made. Still looks good on my bench. The only thing that has me thinking now is with my new BBK TB twin blade I could go back to that RSI unit since it has spperate intakes for each blade or just stay with my K&N unit that I was running with my single blade X-Metal TB.
