Have A Nissan 2005 Titan with 40 Flowmasters and Nismo Intake..Having coming as upgrades..new JBA Shorty Headers with a Airaid Throttle body spacer and a specifically tuned Unichip. Just went to a car show today and love that sound of the old chevelle ss and GTOs. I want to have that nice crackle like rumble when its idle and when you hit the gas its loud loud loud?? What else can I do as modifications to the engine to make it sound like that?? Any ideas are much appreciated. Thanks everyone.