No we (or any of the other manufacturers I believe) do not sell things on this forum, I do not think that it is allowed. We sell primarily through dealers however if a consumer such as your self need parts or something that is not stocked or can not be located through a dealer then we can sell those direct. You would just need to touch base with us, easiest way is just to send us an e-mail at [email protected] (full contact info and phone # can be found on our web site at Werks Racing). let us know what you are looking for and give us your shipping info and we will get back to you with a quote. Unfortunately we are still catching up on inventory levels as all of the factories in Italy were forced to shut down for several months during the pandemic which caused a mess. I did just check stock though and we have every size venturi available in 0.5mm increments from 5.5mm to 9mm with the exception of 7.5mm which we are currently out of.


Going up in reducer will increase top end at the expense of fuel consumption as you mentioned. However I tend to look at reducers/venturi changes as a means to fine tune performance for specific track layouts/conditions. I do not look a them as a means to dramatically alter performance. I mention this because I have never really had any people say that their B5's are lacking in top end. Are you running a 2058 with it? Also are you happy with the bottom end? if so have you tried altering gearing, that will make a bigger difference in performance than a venturi change?