As for whether its the viper kit, uve lost me, not one of k+n's products is called that, to be honest the 57i kit is very basic, and thats the reason why k+n installed it for me. Mine was the car they took the engine blueprint off to make the typhoon and 57i kit for the car, and after 4 months of waiting they fitted the typhoon kit for me and that was fantastic, sounded great and literally the whole street would turn to see what car it was, any way, after about a week, it started flagging up the engine malfunction light, so upon my return to k+n, it was found the petrol running into the engine was too lean and thus unsafe to continue running the car on the system. this was due to the kit being developed in sweden and they believed the aluminium tube was the wrong inlet diameter. Now i have the 57i kit, as a kind of apology, it still gave me 9bhp, which is a hell of a lot, and 17lbs of torque, it sounds great, but just not the booming sound that used to resonate deep within the aluminium tubing of the typhoon kit.
hope that helps
http://www.civinfo.com/forum/type-r/...s-removed.html - тут они обсуждают фильтры на FN2