So far in my brief ownership I've added/changed....
E36 LSD w/3.64 ( from an open w/3.42)
Oil Cooler w/Thermostat
Carb Spacer ( had to slightly adjust hood for clearance)
KYB Rear Shocks ( Gabriels were shot before 1k miles)
Rubber Grommets on tail lights/blinkers
Short Shifter
Battery
Cobra Emblems
427 Badging
Cobra Horn Button
Im really impressed with my BDR. My only real complaint is the height of the rear tires as it can bottom out pretty easy hence why i went with stiffer shocks and adjust ride height.
Ive often wondered about the 92" wheelbase of the BDRs. I think its very tastefully done and I love the look of my BDR ( and the room it provides for tall individuals) but wonder if it was done for that reason or another vs going with the original 90" wheelbase.