Zex has a BMW specific kit, as well as some kick ass parts. If anyone is interested, we are putting an order in this week and can give killer bimmerforums special pricing.

The key to NOS is to build a system with checks. So if the parameters are not in line, the system will not fire. If you do this and use a reasonable shot, there is no issue with reliability or damage.

We have installed and used kits on BMW and Benz (c32) with no ill effects, as long as the customers let us do the system the right way.

Thanks
Brad

More info as requested:

http://www.zex.com/Base/Flash/400-300-KitBanner-001.swf

http://www.zex.com/Base/Images/Products/400-330_EFI82019_001.jpg

A complete "Dry" nitrous system. Everything is included for a safe, proper installation.

• Designed to work safely on both stock and high-performance, normally aspirated engines. The ideal nitrous system for many fuel injected performance vehicles.

• All major components are factory pre-assembled inside the "Nitrous Management Unit". Easy, plug and play, two-hour installation.

• ZEX Nitrous Systems have an advanced, patented feature called "Active Fuel Control". This feature monitors nitrous bottle pressure and adds or subtracts enrichment fuel. The engine never runs too rich or too lean when engaging the nitrous system.

• ZEX "Dry" nitrous systems activate at wide-open throttle, using advanced electronics that monitor your engine's throttle position sensor. This makes using your nitrous system very easy and reliable.

Retail: PART #82019: $611.94

PM me for pricing on this.