A BMW Performance chip you can program directly from your laptop - many have been anticipating a product like this for years: The wait is over! The Miller W.A.R. Chip gives you control of your modifications and allows your car to perform butter-smooth. The WAR Chip has a pigtail with a USB cable you can plug into your laptop and tune on the go. You can run multiple tunes on one chip. You can change between 4 different tunes that can be stored on the WAR Chip using the attached 4 position switch (for example you can have, a street tune, a race tune and a valet tune stored)u2026
Yeah, we borrowed that from the WAR web site page. We've tested many performance chips for the BMW, we think the Miller WAR chip is best.