Yes, The combo provides some performance gains that I can feel. My butt-dyno tells me that I did gain some hp/torque with K&N air filters and the Sprint Booster does seem to reduce the throttle lag significantly when pressing the accelerator pedal. However, non of my perceived power gains have been proven by a measuring device such as an dyno. The stock filters are cheaply made crap with a very small filter surface area compared to the larger K&N filter surface area, so I am sure that the filters did provide the 5.0 with much needed air flow. Regardless, I am happy with how my car performs with both mods.