if i dont have to upgrade i wont. I love the quietness, pulling up to a piped out mustang, camaro, subee, evo, and holding my own. id like to keep it as quite as possible.
If i need something loud to drive i got the streetbike with a yoshimura exhaust for summer when the BMW isn't fast enough, and a 5.4 F-250 with dual pipes and a 800cc sled with an mbrp can for winter.
Maybe I will invest in a cut out.....straight nasty with the flip of a switch