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... I sure do miss you
1990-somethin Chevy K3500... Twin turbo Cummins swapped Chevy, dana 60 front axle swap, 4 link rear, air ride, custom everything. 600+ hp, 1296 ft lbs tq