Is it better to port/ polish the factory 2003 or go with a aftermarket?

 

What are you talking about ? 2003 what ? You need to fill your info in (top right corner) so we know what your referring to.

 

do they even make aftermarket intake manifolds for these trucks?? i dont think anyone does.

 

ive got a ported intake, helped a little, I wish i had the heads ported while i was that far into the engine

 

Im going to assume youre asking about a 4.6L, since mine is a 2002 5.4L and its the damn plastic one, and I dont know if its even possible to P&P the plastic ones. Or did they change them back over to aluminum on the 2003?

I could be wrong about the entire above paragraph. Im running on no sleep right now.

 

Thanks. Yes the 4.6. If no one makes one, anyone know if the 4.6 mustang would fit?

 

Sorry about that. 4.6.

 

No problem, yea Patman (above) and Faster150 have done a 4six. I've done my 5four , but really can't tell if it improved anything.

 

if you port match everything from the filter down as far as possible it would help a little

 

mustang should fit but you would loose alot of low end torque

 

Thanks for the feedback guys. Last question I'm asking. What mod is after the intake exhaust and tune?

 

I have an extra 4.6 aluminum Npi mani....

Some pics of the polishing here:

https://www.f150online.com/forums/me...-onelowf2.html