I am in a similar situation. I have about 100K miles on my car and I am thinking of supercharging. From what I read so far we should be fine. With moderate
boost (6-8psi) engine stress is not that high.
For sure I am going to replace all major parts of the cooling system (hoses,
thermostat, waterpump) before going the FI route. I am thinking of using the
Steward waterpump and adding an oil cooler if the SC kit does not come with one.
Now I am just waiting for ESS to release their TS kit for the 328i.
Dinan Stage 1 Suspension
Dinan Stage 2 SW
Dinan CAI (deleted)
UUC SSK EVO3
Stoptech SS brake lines
Hawk HPS Pads
Redline Oil all around