Originally Posted by BMWERKEN

We have our Speed Innovation software available which is a complete ECU retune that recalibrates a variety of parameters including intake timing, throttle maps, torque maps, top speed limiter and rev limiters to give the engine better response throughout the entire range. With our software for the 4.8, you are looking at a 21hp/21TQ gain on 91OCT or a 29HP/26TQ gain on 93OCT. Pricing is normally $749 but we offer an X5World member discount for $710.