headers (on jcwhitney)

[faithjr]

Does anyone have any numbers (HP) increases from these is it worth the 175 bucks ? I've almost finished rebuilding my 2005 aveo It was bored out 50 thousandths over, so I started thinking about the exhaust if I might need the extra flow.

[serega12]

I paid $400 for xiaogary's header shipped from Malaysia... Gains were noticeabl , even after I went with 2-1/4 custom open exhaust from a local muffler Shop with a twister muffler. Bestgains wwould be attained if we could tune for them, but nobody local would do it.