Kraftwerks supercharger. This has mounting gear for an NC Miatia, but can be fitted to otger 4 cylinder motors like a Civic. Cost was originally 5k so the price is firm. This has only 3k miles on it. The full kit is included plus extra rotrex fluid. Bolts on, and you can do it yourself with the instructions. This made my Miata wicked fast, but it scared my wife, lol, so its up for sale.