I just got the headers on yesterday. It took about 2 hours - all the holes lined up - life is good! Two of the spark plug boots on the drivers side touch the headers, I covered them with insulation, and I'll be looking for aftermarket wires. Seat of the pants dyno, it feels like I picked up a few ponies, It's to soon to tell if I improved my fuel economy
Nice headers but pain to install
They are a great addition to the car and really sound great. The install is rough. It's due to the design of the car and every header would be a pain to install. There is just no room at all to work. But many hours later I'm happy and I reused factory multi layer steel gaskets instead of the cheap ones that come with it.