it shouldent get much louder with a downpipe. did you get the gasket in it good and all sealed up??
Damn this thread got long. Lol! Hey bio does that happen a lot with dps when it clanks on the sway bar? I never really payed attention but mine might b doin that. U say u can flip the sway bar over? Will that cause the car to notice a knock and add kr?
stock is 15.1, mines in the 14.2 range, no tune, l36 bottom w/3.4 pulley stock plugs and headers stock intake
a 3.4 car that has a very good tune on it and someone in the drivers seat that knows how to drive can pull off a mid 13.