PI Intake on 5.4?

Hello, I just saw your message. If youre interested in swapping to a 4.6 manifold, you run into a couple issues but the stock pi intake manifold from any 99-11 crown vic, which are dime a dozen, make for a fantastic option. Its a big step up from a truck manifold for power 4000rpms up but there will be a tradeoff for a loss of low speed power below 3k. The only real problems swapping is you need to adapt stock 5.4 fuel rails or swap to 4.6 rails, cruise control linkage will not work without modification, vaccum fittings on the plenum are different which is fairly simple, and youd require a new zip tube(cai). All said and done, the PI manifold will be better than stock and support more power. The adapter plates add to an already too long of runner length and is not optimal but better. Ive seen good use with plates and a victor jr. That manifold could use the xtra runner length but for an engine that cant handle 6500rpms, a short runner isnt ideal. If youre interested, I could source you either a 99 pi 5.4 manifold or a 99-11 PI 4.6 manifold.