i want to make a motogp style slip like darkhorses lean pipe but i want it to have some back pressure and not be so load, so i designed this.
the three solid black things are washers, the one in the middle is just a stopper that stops on the stop ring on the stock headers. the other two washers free sliding, i am hoping to have the ability to move it so i can adjust the sound like a trombone. when i find the noise i want just tac weld it into place. the bottom and top washers are attached to a perforated tube witch i'll wrap with muffler fiber glass. i didn't want the slip on to be too long, i feel like it would take away from the look i am going for so i think i am going to run the perforated tube down the stock exhaust tube. if the setup causes to much restriction i'll just drill holes into the washers. any input would be great. do you think the fiberglass will help with the sound deadening and backpressure? i shimmed my needles about 2mm do you think this will me out to much?