Originally Posted by amgthis
JB4 is awesome, you might even be able to keep up with 550is and M5s because you are lighter!
Official numbers from BMW website
stock 535i 0-100km is 5.9 seconds
stock 550i 0-100km is 5.0 seconds
stock M5 0-100km is 4.3 seconds
Looking at the dyno sheets so far of JB4 and if the official numbers match actual runs then I believe it will shave off some seconds to make it something like 5.5/5.6 for 0-100km..you will not be able to keep up with 550i..forget M5