Just a quick question/ thread....Can the Pacesetter 4-1 header for the SS/SC be used with the car's stock downpipe? And, I've owned a pacesetter header before for my 87' Supra N/A and the O2 bung was mistapped, any fitment issues like this for the Cobalt's header version?

 

The only way to use the stock downpipe is to chop up the connectors and reweld it. The pacesetter uses a ball-style fitting.

 

I have the lsj pacesetter and love it honestly, no o2 issues at all. But you will need to do some welding sadly