Zex is at the forefront of nitrous technology with its innovative wet nitrous system. The Zex system incorporates the most technically advanced performance features available, including the patented zex active fuel control. This innovative performance and safety feature automatically adjusts the nitrous fuel enrichment so your engine never runs too rich or too lean. In addition, the zex nitrous system features a patented electronic tps switch for perfect system ativation at wide open throttle. All the kits primary components, like the solenoids, filters, and activation electronics, come factory pre assembled inside an enclosure called the nitrous management unit. The zex kit is a simple 2 hour installation. A complete nitrous system. Everything is included for a safe, proper installation Designed to work safely on stock type engines, but is also performed to work flawlessly on highly modified turbocharged and supercharged combinations. The ideal nitrous system for any fuel injected vehicle. All major components come pre assembled inside the nitrous management unit. Easy, plug and play, 2 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 so the engine never runs too rich or too lean when you engage the nitrous system. Zex wet nitrous systems activate at wide open throttle, using advanced electronics that monitor your engines throttle position sensor. This makes using your nitrous system very easy and reliable. The part number for this item is 82021 and it fits 1986-2006 Acura RSX, Integra Honda Civic, Prelude, S2000 models.