Upgrades to my stock 273 67 Dart GT

yeah you can do duals off your stock manifolds. then down the line when you install headers you just hack the system back and connect it in.

you'll need two mufflers, so either another one of those if it's what you want and it fits or two mas.
Thank you! I am super excited to make the car way louder. One of the workers at the shop started my car and actually told me he could barely tell it started because of how quiet it was....

After reading through the replies I will most likely wait on headers. Will dual pipes and two new mufflers make a world of a difference in volume without the headers? If anyone has any recommendations on headers for my application just for me to reference and see prices that would still be appreciated as well.

THank you all for the replies!