I have a 12mm Bing Carb (with 12mm intake) and I'm looking to upgrade that to a 15mm Bing Carb and 15mm intake manifold. In company with that, I also want to upgrade the Air Filter and Exhaust, which I have to do if I'm upgrading the Carb, right? I guess I'm asking for recommendations on Exhausts and Air Filters that perform well and are going to fit well (I don't want to have to do much alteration.) I have a stock Puch Magnum XK--and I'm wondering how much more speed I will get after doing these alterations.
All of those things will work fine with the rest of my stock engine, right?
Lastly, how is this air filter?
Anyway, thanks for your help in advance.