I bought this car at a Cars and Coffee from the 2nd owner 6 months ago. It's a great car and is very quick. I had originally purchased the car with the intention of making it an SCCA GT2 certified racecar, but ran out of time and energy to pursue that and will stick to HPDE days in my other cars.
Completely redone engine to S52, keeping OBDI (yay!) electronics
Fully upgraded chassis and suspension
New paint
New tires
Virtually a 2 owner car
Rare, sunroof delete car
The receipts were over $9k on the 3.2L engine alone, and actually ended up being near $30k overall. The car basically has the entire Turner Motorsports catalog thrown at it. All of the mechanical work was done by TruSpeed, a professional motorsport shop that competes in ALMS/World Challenge events. The mechanic responsible for the component selection and installation on my car was a BMW Master certified dealer technician for 15 years before joining the motorsport shop.
The engine (now about 3000 miles on it):
S52 short block, 3.2L
brand new rods and pistons
fully rebuilt head, 100% new cams, springs, lifters
retained S50 manifold/OBD1 control
Turner Motorsports Stage 3 kit (link) = cams, intake, AFM, injectors, ECU chip
Supersprint stainless race headers, stock cats, Supersprint stainless catback
Lightweight Al flywheel, Turner Racing clutch kit
3 row S54 aluminum radiator, aluminum end tanks
aluminum thermostat housing/ upgraded water pump/ new overflow bottle
new oil pump, welded nut
Electric fan conversion
Chassis
100% brand new rubber stuff - belts/hoses/gaskets, etc
Bilstein PSS9 coil over kit
Turner Adjustable rear camber arms
Performance Friction 3-piece rotors, upgraded street/track pads
Upgraded ARBs
Upgraded LCABs, RTABs, RSMs, trans mounts (poly, e46 m3, etc)
Add-ons (again, only 3000 miles old):
Fikse Aluminum Forged wheels, 17" ($3k new)
Nitto NT05’s with 1k miles + 1 track day
Bolt in 4-pt roll bar
Sparco Evo seats and belts
Seibon carbon fiber hood
Alcantara steering wheel
Panasonic head unit (matches dash lighting)
Satin red paint job