4.6

bruyn · **4.6 - 5.4 swap**

Does anyone know if a a 5.4 modular will bolt in in place of a 4.6 in an '04 Mustang GT?

Thomas91169 · **Re: 4.6 - 5.4 swap**

not as easy as you think. i too was on the 5.4L/4V swap, but its not an easy task. i dont remember the entire list of parts, but its long. and its not a direct changeover.

**SpectorV** · **Re: 4.6 - 5.4 swap**

whats the main reason for wanting to do the swap other than saying you have a 5.4L engine. Just wondering if you might be going through the trouble for nothing.

lowflyn · **Re: 4.6 - 5.4 swap**

The swap is worth it for the torque difference if nothing else.

It is a very lengthy and complicated install however. It is a tight fit if you go DOHC...which is the only way I would go.

Thomas91169 · **Re: 4.6 - 5.4 swap**


Quote: Originally Posted by lowflyn The swap is worth it for the torque difference if nothing else. It is a very lengthy and complicated install however. It is a tight fit if you go DOHC...which is the only way I would go.

either way i think you need a different hood, i think if you go with the sohc 5.4 the manifold has clearance issues with the stock hood, if you go 4v im sure you will run into the same problem.

bluemustang · **Re: 4.6 - 5.4 swap**


Quote: Originally Posted by Thomas91169 either way i think you need a different hood, i think if you go with the sohc 5.4 the manifold has clearance issues with the stock hood, if you go 4v im sure you will run into the same problem.

yeah you do a buddy of mine did this swap and ended up buying my old steeda cowl hood off of me

wrecked2001 · **Re: 4.6 - 5.4 swap**

besides the the usual stuff you will need a different hood, different intake, 4.6 GT intake will not fit, and the truck intakes are not the best for horsepower. Eithet a 4.6 with adapters or custom intake. Custom headers. I think that might be it

bullitt482 · **Re: 4.6 - 5.4 swap**


Quote: Originally Posted by lowflyn The swap is worth it for the torque difference if nothing else. It is a very lengthy and complicated install however. It is a tight fit if you go DOHC...which is the only way I would go.

+1. Plus if the engine was out already, it would be getting bored and stroked. No point in removing a stock engine to put another stock engine back in.