Does anyone have any before and after dyno #'s of header installs? I've done multiple searches and haven't come up with much. If you did more than one mod at one time that would be interesting as well. I feel a subject like this would make a good Sticky...tried and true hp/tq #'s for mods.

 

Long tube headers will yield about 12-20 rwhp. Shorties about 5rwhp.

 

I will find out Sat when I get it retuned for the headers.