Personally. I would not do it myself.
I want everything done right for my car so i would still have it done by my typical mechanic, a buddy of mine, who is really cheap anyways.
If i was going to do myself, i would have someone local with me such as Josh (Iceman6669) and/or Jeremy (BoostenGTP) to help me out since they both have helped me multiple times in person with my car.
hey dan guess what they are back in stock lol
Stainless SS Racing Manifold Header Exhaust Grand Prix GTP Regal Impala 3 8L V6 | eBay
De rib it! Im planning on doing it eventually