Quote:
Originally Posted by NE149
I want to put a stack on... does the stack need a muffler? For the sake of back pressure? I don't care about noise... I'm young and learned early to wear ear plugs for everything :P 
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No, doesn't need a muffler for back pressure. There is truth to getting a stack on and the carb tuned. A stack can affect HP. On a stock motor, I doubt any that you will notice, I'm just saying. Anyway, hardware store should have what you need. I don't see why you can't find any. It's just 1" pipe. I suggest a long sweep, or 2 45°'s to make a 90°. That way it's not so abrupt of a turn for the exhaust gas.