my friend told me to get metal conduit make hole on the cap at end same as baffle hole slip it on the muff clamp it and it will be very loud my question is does that increase backpressue or decreace it to dangerous levels??

this is from a honda car owner site but i'll paste it it sounds good and i believe backpressure on a car bike is t. If you want noise, and absolutely nothing else, then this is what to get...



Step 1: Consume contents - Low GI energy drink will increase driver performance.
Step 2: Remove green wrapping - you don't want people knowing you paid that much for it. Additionally, wrapping may be flammable... you can polish it at this point if you wish.
Step 3: Cut out a hole big enough to fit over current muffler tip. Weld here.
Step 4: cut hole as big as baffle on other end of 'new muffler'... airflow will pass through this unit and provide additional meaty soundzzzzzzz...


he same importance