Headers For a 318 in a 71 Dart

If you plan on adding headers, look at Doug's headers. There a 1-5/8 tune that doesn't hang low. Expensive units, but nice they are.

On a stock 318, even with adding a 4bbl. carb and intake, you will not really feel a difference. There is some. It will show up on a drag run. Minor, but there. The best reason to add headers is to help make the engine more efficient.

Headers help in mileage. Along with a well tuned carb and a MSD or equal sparking the fire, you can add 3 or MPG's. 2-1/4 pipe is all you'll need. Careful cam selection can also help.

Again, careful tuning. TAKE the TIME to do it well.