Doug's D453 Headers

Im in Canada and got my D453 shipped to the US for 502.00 from Autozone with the 20% coupon. I put these on my 72 340 Duster, man what a difference from the Hookers. Now I can drive without the worry of bottoming out over every bump. I am very happy with the D453s

sorry to thread jack but when you changed over the headers, did you have to do anything to the rest of your exhaust or did they bolt right up to your old exhaust.