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 vacuum or air leaks from the old manifold.
My question, since this was a 2000, it was using the previous all plastic manifold. I know they changed the design in 2001, to include the aluminum runner and increased airflow. Since the 2000 had the PI heads, but was using the old style intake, was the Dorman actually an improvement in airflow over the stock all plastic 96-00 design?
Also, what improvements were made to the 2001 4.6L to produce 320 hp @ 6,000 RPM, vs the 2000 4.6L with 260 hp @ 5,250 rpm? I know they improved the intake, possibly exhaust and other internals? Thanks in advance.
My question, since this was a 2000, it was using the previous all plastic manifold. I know they changed the design in 2001, to include the aluminum runner and increased airflow. Since the 2000 had the PI heads, but was using the old style intake, was the Dorman actually an improvement in airflow over the stock all plastic 96-00 design?
Also, what improvements were made to the 2001 4.6L to produce 320 hp @ 6,000 RPM, vs the 2000 4.6L with 260 hp @ 5,250 rpm? I know they improved the intake, possibly exhaust and other internals? Thanks in advance.
