How much modifing did they need?
I installed them while in the car. It took me 9 hours at the shop I work at. The down pipe did not come out of the car, I loosened it up and tucked it as close to the heater box as possible. It wasn't easy getting the new ones in but I was able to do it, I also had to discharge the AC system and take the lines off the compressor, and move the compressor to get the new ones in. Getting the old ones out was a lot easier than the new ones in. Driver's side is easy just passenger side was the time consuming one.I saw these on ebay i wonder how hard they would be to install in the car. Also how are the ports in relation to the headers?
That would be a good way to start. The new manifolds are bigger diameter so I had trouble getting them in without removing the down pipeWhen i pulled off my stock manifolds, for the passenger side, i removed the altornator, unbolted the ac compressor and put it to the side, and im pretty sure thats all i needed to do.