Has anyone changed there headers yet? Im looking around for some myself and i was wondering what kind of performance iI should expect.

 

Do a search on headers in the Silverado board and you'll find this subject has already been covered VERY in depth.

Long story short, shorty headers will produce nothing more than a little top end power at best. The best idea is a set of good long tube headers. It seems to also be mutual that Pacesetter headers suck.