Getting my DP gaskets today and will be putting it on. I ordered 2 just to have a extra one or if someone needs one right away! (just email me if ya do)
Im about 99% sure its the DP Gasket thats causeing the noise and slight pop at low rpms. If it was the up pipe i dont think id be hitting 17 psi every time i run it hard. Well we will see today! ill let you all know.