Like to hear from those who put a 3 in complete exhaust in a Dart (70) .......

As an alternative that is easier to install and less expensive, Pypes makes a 3" to 2.5" hybrid system that is optimal for up to 600 HP. 3" X, 3" Race Pro mufflers, 2.5" tailpipes. SMA30R. The system can handle higher HP cars but the HP gains start to become less optimal if you are racing at the track. Pypes recommends electric cutouts for these applications so you get the best of both worlds. Perfect for the street. Open up the cutouts at the track for better performance than a full 3" system.