Hi I'm currently thinking about buying a Pipercross Induction Kit for my Fiesta Zetec-S. Someone i know from work is selling a Pipercross Viper kit (these cost around £250 brand new) and he wants only £100 for it. A normal Pipercross induction kit costs around £75-80. I am tempted by the Viper kit but it claims to make power increases of around 10bhp, to me this sounds like BS. I've also not heard veryu good things about it, most reviews i've read say that it isnt worth £280 but seeing as i could get it for £100 it may be worth it. Recently a friend from work mentioned something called an 'Ecotek valve'. Ive never heard of this myself and was wondering what it was. He says it is like an induction but offers better gains. I've been looking around for some info on these Ectotek valves and to be honest i dont really understand what it does. Can anyone explain to me what Ecotek valves do? Are they a replacement for induction kits? If Ecotek valves are a load of BS then should i go for the Viper induciton kit or just settle for a standard Pipercross induction kit? Thanks in advance!