Hi,
I am thinking about putting a header and a performance pcm on my 2000 sohc neon. I already have a cold air intake and magnaflow muffler. Would the header and pcm make a diffrence from the couple of mods I already have?

 

with the header, u will b getting airflow through ur exhaust so dats good, pcm not too sure but i do believe its a plus. i kno getting a pcm from a r/t is an upgrade.