With Magnpack Catback, X-pipe, K@N CAI, and basic Predator tune, I baseline dynoed at 257/275 on a Mustang Dyno. The timing in the basic Predator tune was too much for my Mach, so they actually dialed out timing. After 6 dyno runs, it maxed out at 270/287. a 12 HP and 13 TQ gain. I switched out the K@N CAI for a C@L system due to the K@N constantly causing stalling. Went back and did another dyno with AFR and got it dialed in at 13.1 AFR and picked up 3HP and 3TQ with the C@L. No great numbers with the C@L but no stalling and my idle is smooth and not choppy, and response is nice. The Predator may be outdated with this new Excal 2 that is out that you can download tunes from your computer for each mod you make.