What kind of gains in E.T. and speed would unhooking the exhaust pipes from the headers could I see at the track? I run TTI headers with a 3" collector into 2 1/4 pipes through Ultra Flows and out to the chrome tips. Also would header extensions be beneficial? It runs great with the setup, just wondering if it was worth the effort to unhook them. Motor is a 416 stroker. Thanks!! Greg