I personally dont have one, but if you can afford to fill her up with 93 octane, then you'll see noticable gains. They work especially well if you flash the DME after a big mod, like an M50 mani swap. I want one, but with gas going the way it is, I'll take my chances with the stock computer.
RIP Ben "Jever" Doebele, we wont forget you
Please, call me Chadley
1997 328iS... HR coilovers, Brembo F40 calipers, camber plates, it needs a CUMMINS!!
1990-somethin Chevy K3500... Cummins, cab swap, 5 speed, and lots of motor work. 20 MPG, 40 PSI, 507 ft/lbs torque