i drilled six 7/8" holes in the muffler end caps it made it louder especially under throttle. i unhooked the 02s to give a little more fuel.
i did not get a remap or air filter upgrade. it still ran fine. sounds way better than than stock.
i just wanted something until i could get the stage 1 kit that i really wanted.
09 vegas 8ball
rpw thor,pcV,loydz air box
mustang seats, ms batwing,
ebc pads, d407/408 tires,