I am the original owner of this 1995 3000GT VR-4. I bought it new February 1995 for $51K after addons (re-tint windows darker, CD changer, tax, licensing, etc). The following are the modifications I have done since then. The mods represents Stages 1-6 of modifications of the VR4, stereo system, etc. Total cost of all mods is approximately $53,000 for parts and materials. Most of the labor I did myself. Not all pics show all mods. Some pics are outdated.

ENGINE/DRIVETRAIN Modifications

• 15g Turbos
  (larger turbos, more power and higher boost capabilities)
• 550cc Injectors
  (more fuel needed to feed larger turbo power levels)
• DNP Stainless Turbo Hardpipes
  (nicer looking, larger diameter pipes for more flow)
• DSM Converted Intercooler Cores for SMIC
  (better intake air cooling for more power)
• AEM Engine Management system (1311-ECU)
  (complete engine system managment, more here)
• AEM dual channel wideband O2 kit
  (replace narrowband for finer tuning control)
• 3.5 Bar MAP
  (replaces stock MAS. Now a speed density system)
• Dejon Intake pipes w/ dual K&N air filters
  (better flow, get rid of OEM restrictive intake)
• HKS Turbo Twin Stainless Exhaust-Twin Tip system
  (nicer sound, larger diameter pipes, still looks stock)
• Stillen Stainless DownPipe
  (larger diameter and less bends, more power)
• Pre-Cats removed (front) , rear gutted
  (less restriction in exhaust)
• HKS SSQV BOV (blow off valve)
  (able to hold higher pressures)
• Koyo heavy aluminum radiator
  (increased cooling abilities, more power makes more heat!)
• All Silicone Coolant Hoses
  (better protection against high heat, looks nicer too)
• Flexalite 12" twin electric radiator fan system
  (better fan flows, custom controlling of activation)
• HKS Circle-the-Earth Grounding system
  (better grounding system maintains good electrical operation)
• Denso Iridium Spark Plugs
  (better performance than the stock platinum tips)
• 99 Lifters (3rd gen)
  (gets rid of the previous 'lifter tick' issues)
• Accel HiPerf Wires
  (better delivery of high voltage to plugs)
• Optima Battery
  (better output, reliability, cranking amps)
• Custom Spark Plug Cover, polished/powder coated
  (just for looks)
• Full Silicone Hose Replacements
  (looks nicer but also better heat protection)
• Denso Fuel Pump upgrade & hotwire
  (maintain the higher fuel demands of larger injectors)
• AEM adjustable FPR & fuel pressure gauge
  (same as the fuel pump - maintain higher fuel flows)
• Polished Fuesbox Cover & Injector wiring cover
  (looks only)
• Greddy Oil Catch Can
  (collect oil crud instead of delivering back into engine or intake)
• HKS Twin Power DLI Ignition Amplifier
  (huge increase in spark output and duration, prevent spark blowout at higher boosts)
• Spec II+ Clutch
  (to hold higher horsepower output)
• Spec Lightweight Flywheel
  (faster rev'ing and quicker response)
• Tein FLEX CoilOver Suspension (lowered)
  (better response, lowered for better cornering)
  Just try and beat a lowered AWD/AWS VR4!
  
• EDFC Suspension Controller
  (in cab control of the FLEX - can change front/rear suspension settings
  on the fly in cab)
• 3sx Camber Control Arms
  (required to give better adjustments for alignment after lowering chassis)
• Aquamist 2D Water/Alcohol Injection System
  (prevent knock at higher boost pressures, keep carbon hotspots off engine internals)
  SEE MORE HERE
• HKS Intercooler sprayer system
  (prevent heatsoak or cool down overheated intercoolers and/or radiator)
• Setrab Oil Cooler, Front Mount (FMOC)
  (increase oil cooling ability, move to front for better air flow)
• QTEC Electric Exhaust Cutout and Controller
  (Y cutout for open exhaust, in-cab controlled)
  
  
  

  Click image to see engine photos

  
  BODY Modifications
  

• Re-Tint Windows
• 99 Conversion:
  Sail Panels
  Rear Spoiler - high design
  Back Center Panel
• 575 Ferrari Style Carbon Fiber hood (painted)
  w/ air ducting to intake and rear turbo area
• PIAA 1000XT Driving Lights
• Active aero (front and rear) removed
  (replacing the rear spoiler eliminated the need for active aero, ie- motorized spoilers)
  
  (no photos of 99 spoiler or hood yet - photos coming later in 07. Click image below for body shots)
  
  
  
  
  INTERIOR Modifications
  
  
• 3 gauge full A-Pillar pod
  (added room for 3 gauges: EGT, Oil Temp, Turbo Boost Pressure)
• Custom console controller installs
  (complete remodel of center dash for electronics)
• Polished VR4 Door Sills (Carbon Fiber & Scotchlite)
• SS. Short Shifter
  (reduce shift travel requirement, quicker)
• HKS 6speed shift knob w/ leather boot
• MOMO Racing Pedals
• MOMO E-Brake Handle
• Complete Stereo customization (see below)
• DEFI HUD (Heads Up Display)
  (can see speed or tach in windshield without looking down)
• Custom electronics pod for EBC
  (electronic boost controller - Blitz i-color)
  
  CLICK IMAGE TO SEE INTERIOR
  ELECTRONICS (details can be viewed at the photos interior page from top left menu)
  
  
• HKS Turbo Timer-Type 1
  (keeps engine running on it's own to cool down turbos)
• Active Radar Jammer
  (obvious)
• Blitz DSBC i-Color Electroniz Boost Controller
  (in cab control of boost and turbo gain)
• AEM Pro Serial Guage (shows timing, knock, load, egt, O2, etc)
  (multiple parameter monitoring)
• AEM UEGO W/B O2
  (3rd wideband O2 sensor after front and rear banks merge)
• HKS Fan Controllerw/ IC & Radiator spray controller
  (in cab control of radiator fan operations, sprayer for cooling
  the intercoolers - spray methanol/water)
• HKS Injector Pulse Monitor
  (monitor injector duty, alert when over set %)
• Defi HUD System
  (see speed or rpms on windshield without looking down)
• Custom Omori Gauges (6), white faced, BL color controlled.
  (higher quality/accurate meters)
  Added Meters -Water Temp, Oil Pressure, Boost, Volts, Oil Temp, EGT
  (Omori custom made RGB Backlight and needle color selectable)
  Lateral & Acceleration G-Force Meter
• AEM Wideband O2 Gauge
  (for tuning)
• Aquamist DDS3 controller and gauge
  (for in cab monitoring and control of alcohol/water injection system)
• Intercooler in/out temp monitors display
  (tell if intercoolers are doing their job, not heat soaked,
  monitor output air temps or comparitive readings)
• Smartire Remote Tire pressure and temperature system
  (2nd gen wireless tire pressure monitor display and temperature display.
  provides real time display & warnings of all tire pressures and temps in cab)
• G-Tech Pro RR Performance meter
  
  STEREO
  
  
• Kenwood DDX-6039 TouchScreen MONITOR System (CD/ MP3/ DVD)
• Kenwood "KEG" MP3 Hard Drive Storage - 40GB
• Kenwood KNA-G510 GPS & Navigation System
• Kenwood CCD-900 Rear Camera
• MTX 8000 10" subwoofers (2) + custom enclosure
• MTX 6532 Speakers
• MTX 900W 4 channel Amplifier
• MTX Subwoofer Amplifier 450W
• MTX CROSSOVER RT-X02A
• X-Static BatCap 400 amps
• Infinity Kappa Speakers 60.5 door and tweeters
• Infinity Kappa Speakers 63.5 three way
• DynaMat installed throughout for soundproofing
  
  For stereo specific info and custom install photos CLICK HERE
  
  OTHER Modifications
  
  
• Power Slot Brake Rotors
  (better heat reduction and cleaning off of pads)
• Hawk HPS Brake Pads
  (good all around street pads)
• Stainless Steel Brake Lines
• Trust ( Greddy ) Front and Rear strut bars

And other such things , little things like brake caliper epoxy painting and so forth.
Those that own 3000GT's know it's a full time job :)

I use the stock 18" chrome wheels currently. For tires I prefer the Yokohoma A028's (orig OEM equipment). They are the higher end tires (at about $325 each) but they handle better than lesser tires and the ride is also smoother with the better (softer) rubber. The Eagle F1 tire range are also reportedly as good.