I want to get a couple of recirculation valves, the stockies are making bird noises. Anyway i cant remember what size inlet out let pipes they have. I think its 34mm but I'm not sure, can some one chime in with the correct size..
I can confirm rebuilding the Stock Recirculation valves is easy and a brilliant idea if you plan on running either stock or more boost. No more weird noises. COZ has the rebuild kits and they are cheap.