Been a CarPC hobbyist for 15+ years. Started out with just music and nav and then just kept adding stuff. My newest incarnation has 11 USB devices tucked away under the center console: 1.2G CPU, daylight readable 10.4 in screen, front cam with face tracking, rear cam with night vision, full-time internet, internal cellphone with private number, 16 USB ports (3 open for cameras/phones/accessories),BluSoleil Bluetooth, 54G WiFi, internal 80G HD, external 1TB HD, DVD-RW, FM HD Radio, WinTV USB, XM Commander, Delorme GPS, Saitek X-52 joystick, Tire Pressure Monitoring System (TPMS), Valentine 1 interface, a "Fusion Brain" for computer control of electrical system,i.e., windows/ sunroof/ lights/ HVAC and monitoring voltages/temps/currents/pressures with PC automation of if-then operations, Elm327 OBD II interface for monitoring engine and transmission systems. And that's just the electronics.
The car itself has big brakes with drilled/slotted rotors, a beefed-up suspension, E-36 BMW Angel-Eye 55W 8000K projector HID, 55W 8000K HID driving lights, stealth bulb turn signals, CAI, reprogrammed ECU, custom shift kit, custom 3" Cat-back exhaust with Corsa mufflers, lowered front and back, a supercharger is being re-engineered for it as we speak, and I'm still designing the air dam/ground effects and rear spoiler. Did I forget to mention it also has a 200PSI train horn with 8 trumpets
In case you haven't figured it out, I've had a passion for aviation for a very long time. Named my XLR after a fictitious movie aircraft cause my learning curve in it reminds me of what Clint Eastwood did in the movie.