dumb question

[moot09]

alright my dad has a 5.4l triton. and i heard that the 5.4 heads fit on the 4.6 first off is this true and if it is do the 4.6 heads fit on the 5.4s?

 

[Jrgunn5150]

Yes.

 

[moot09]

worth the trouble?

 

[Jrgunn5150]

If they are PI, they are the exact same, they have PI and npi, same exact heads.

 

[moot09]

well its an 01 so pi then. idk i was talking to my dad and i asked about it and it was considered. idk free pi heads but at the same time swapping them would be a bitch

 

[reivaxtorres]

it depends. the truck engines (both the 4.6 and the 5.4) are NPI and PI, same as our cars, but the years are a little different. also, some trucks (not all) have PI heads, but they still retain the NPI intake ports. meaning basically that the combustion chamber is smaller on the PI as compared to the NPI truck heads, but the intake ports are the same, NPI or PI (keeping the NPI design). i remember reading somewhere that this was for torque purposes.


but to answer your question, like JR said, yes, 5.4L heads will fit on the 4.6L block so long as you use the 4.6L intake manifold (and exhaust manifolds).

is it worth it? only if they are the PI heads that have the PI intake ports. if not.....then no, not really.

 

[KB98GT]

Yes !! thats what i used in my swap!!

 

[justinschmidt1]

Yes !! thats what i used in my swap!!

you need a blower!