Originally Posted by burningstar24

i cant seem to track down hardly any performance upgrades for my 03 civic dx. is the d17a1 even worth putting cash into?

also, i at least want headers. but my cat. is built onto the manifold. i noticed on some headers there are two O2 locations. will the car run fine by just slappin the sensors in there, or do have to find another way to bypass the cat.? thanks