Well... since I'm mechanically challenged...
1) Front, side, rear clears
2) ACS strut bar
3) Dinan engine covers
4) Billetwerks engine bay caps
5) GruppeM intake (after seeing it done once)
6) ACS interior trim kit and shift knob
Vincentw taught me how to install GruppeM.
Hamann99 installed VDO guages for me.
MaclarenF1_ken installed and taught me how to install phosphyre halos.
fasteddie and halsugs taught me to install steering wheel.
Walt's Muffler installed my Eisenmann and BMW Seattle installed my Dinan exhaust.
Car Tender did my software and throttle body.
Cartoys did my sound system (will never go back there again).
Precision Autobody did all my bodywork.
Premier Autowerks installed the rest like coilovers, sways, mirrors, etc.
'05 Silbergrau M3 - mfg date: May '05
Modifications: WAY too much to list