Тюнинг стоковой выхлопной NS200

Free flow muffler. Louder than the first version: Here’s how to do it. 1. Cut the stock muffler. Check the welding marks and trace that. Use an acetylene torch or grinder. 2. Remove all the chambers, clear everything inside. 3. Use a perforated tube or screen and connect the inlet and outlet holes with it. Be sure that it is straight. Weld the tube in place. You can also replace the tip with a bigger diameter pipe. 4. Stuff the whole thing with packing material o