prolly 75, the nitrous purge kit, it works to wit both wet and dry?...Turbo Has its BOV; Nos has its Purge Kit, so when the other guy see's it...he knows wat kind of shit he dealing wit. put the pressure on. plus its good for show =) reason why i'm askin so much cuz the car belongs to my brother, and he's wanting to trade me his car for mine, my car is bone stock, his car is a '00 Civic Si, he wants to top of the deal by gettin the Nitrous sys.