Well I just picked up a used SCT SF3, actually it was brand new but got it for 300.00. No custom tunes yet, soon. I loaded up the canned street then moved to the performance and wow for both. Have to keep my foot out of it, but I do enjoy the performance. Moving up to a 4 inch exhaust this week as well, kind of eager to get that done. I currently have the BPD OIL AND EGR cooler as well as ARP head studs. I felt confident to run the performance tune. No gauges yet, but the Edge insight is in the near future. Now I finally understand what everyone said about SCT.