After I put my exhaust on, I bought a cold air intake. It didn't really make my car a lot louder, but it definitely made it a crisper sound. Haven't done anything with headers, so I couldn't tell you how that would work out. But the CAI definitely gives your car better sound and a noticeable performance increase. Hope this helps...
__________________ 2007 Mustang V6
-Flowmaster AT Axle Back Exhaust
-BBK Cold Air Intake
-Brenspeed 91 Octane Tune
-Ford Racing Push Start Button
-Xenox 8000k HID Lights
-Sequential Tail Lights
-Chrome Tail Light Trim |