So we just changed the intake manifold on my friends 2000 Mustang GT. It was the stock manifold, and only recently developed a crack after 24 years with 141k. We had to go with a Dorman manifold since the Ford PI intake is almost impossible to find now without backordering. After the install, it seems to run great. I was worried about it losing HP since it's a regular Dorman PI intake, but we didn't notice a performance drop. If anything, it seems to run better, I assumed because of random...

2000 Mustang GT 4.6 manifold vs 2001 manifold