Current combo is in sig. I planning on staying NA except for a shot of NOS awhile down the road. I like the price of the Track Heat and R series intakes...but notice alot of people running the RPM II and Holley intakes. I might be swapping to a little larger cam in the future but nothing that will hurt street manners. I don't ever plan on turning the engine more than 6500rpm. I think the TF R intake is too much. Track Heat....rpm wise is about right. I guess the biggest thing is how much difference in the Holley, RPM II and Track Heat.