Want to upgrade/update your cars electronic systems, but don't know how? Here's the solution! Cars of the 1990s and 2000s are from a golden era - they've got sufficient electronic systems to achieve great outcomes, but they're not so complex that they're impossible to modify. The missing link, until now, has been a hands-on manual on how to achieve those results. Well, here it is! This book covers everything from cheap modifications that allow you to adjust engine fuelling and ignition timing, to modifying car systems like power steering and even stability control. Easy upgrades to lighting, sound systems and the dashboard - right through to fitting and tuning programmable engine management. Photos and circuit diagrams guide you each step of the way. All the car modifications are practical, and have been tried and tested by the author. From a 660cc turbo front-wheel drive screaming to 8500rpm on standard engine management but with big injectors... to a DOHC V8 rear-wheel drive with modified traction control... to a twin-turbo all-wheel drive with a custom torque split controller. Even modifying the re-gen braking on a hybrid! This book is essential reading for anyone who wants to exploit the true electronic potential of their 1990s-2000s cars.