Fitted my Eco-Tek last night, piece of piss, didnt bother ordering a silencer with it and i dont need it as mine is pretty silent! Reackon i could fit one in the space though if needs be. Gonna run it for three weeks and keep an eye on the petrol comsumption, done 123 miles today and its used less than it normaly does for the journey! Hopefully get it on the RR aswell to se what it does performance wise, but it is smoother through 2nd and 3rd, not made a judgement yet, all see what happens.