Bro MFA,

Just want to know, I already change to ext 4-2-1, center bullet (1 feet matola), standard pipe and route, and s-flow muffler. Everything work fine for me, but I can still notice that the noise is still a bit loud. Is it because Im still using standard pipe? or my muffler fibre is already out? And if I add another midbox, will that decrease the air flow and pickup?

Please PM , thank you