Need an ignition interlock device near Princeton? Intoxalock is available at Performance Unlimited, a certified Intoxalock ignition interlock installer. We can install your breathalyzer in cars, trucks, vans and other vehicles.Performance Unlimited is a proud partner of Intoxalock. Since 2012, Performance Unlimited has serviced ignition interlock devices by conducting installations, deinstallations, and general servicing of the device. Performance Unlimited is a certified Intoxalock service center where they help you get back on the road safely.