Matts suggestion is probably the best for practicality and certainly far cheaper. My brother has a 4-stroke with straight through pipe and it sounds mad so I am really trying to keep up in the sound department

Does the induction noise with pods sound good or just annoying? I took the silencers off just to try in the garage, damn that sounds bad!!! (Runs like sh*t I know, I was just curious about the sound)
Fontyyy makes an interesting point though that I have heard before, a few holes is better than lots (or no lid) suggesting that maximum air (open carbs) or even pods are not the optimum solution, but someone mentioned that racers run open carbs. Can someone please clear this up?