How much would it be again?? $575? I have an Injen intake along with Borla cat back split exhaust. How much HP should I expect if I go along with the MSDS headers?? 12-15? Overall hp gains with the intake, exhaust, and headers?? Just wondering, because I would love to complete my air flow on my coug.

2000 silver V6 MTX- Injen intake, borla cat-back split dual exhaust, 17" AT Italia Spa's, clear sidemarkers, 5% tint, super halogen lights (blue), painted headlight/tailights