On thurs im doing my first header install and ya i know bill wrote a guide for this and i have read it.
Basicly my stock cat went this week and its perfect cus i ordered my sd headers the day befor. I live in mass and its very strict here. So anyway my question is i want to delete my egr and i got some blockoffs from zzp. How will this effect my car i know ill lose some mpg but is this going to make my car run rich and will a code get thrown cus zzp states it doesnt. Next i obviously have to have a cat due to the fact if they look under my car. Now on zzp they say they can delete the egr and cat codes but i was just reading a thread how even if the cat code is it still causes the car to run rich due to it still trying to read values on 01+ cars? So i thought ill just get a $80 magnaflow cat form advanced but will this throw a code? Also is it a 3" one that i need and how long?
Btw 04 comp g