hey man i did the intake swap on my 98 gt and it hepled out a lot.. it made about a 2 car difference when i race my buddy in his 96 gt..the only thing i had to change was my water transfer tube thats located between the block and intake you have to either buy one for 99 and up or just buy some hose and clamps and re-route it around the intake...the PI intake sits way lower than the NPI