Imo, I'd just swap a S54 in then think about FI.
I think that'd be the best. Most likely, the motor would be less than 100k miles and with FI, the results are greater than an M54. I figured, once past 150kmiles, might as well swap a different engine in instead of rebuilding, but that's me.
It doesn't even have to be an S54, could be another 3L M54. Just my 2 cents though. Also might have to think about reinforcing chasis, etc. From what I read, the engine has to be in tip top shape before even thinking about FI...and that costs a lot on top of the price of a kit
Alpine White 2003 325i: 6000k Angel Eyes, Morimoto Mini retrofitted, Active Autowerke Exhaust, Cooling system refresh, ST V1 coilovers, Underdrive pulleys, Electric fan swap
Last edited by KickTheCAN; 02-08-2012 at 03:44 AM.