MarcusM

What is the difference between these heads? Is it the valve size? Or do the 5.4 heads flow better? Either way I am looking for a set of 4V heads. They will be re-worked so I guess the differences aren't that important. I am just wondering if anyone happens to know.
Thanks
Marcus

And if anyone feels like going outside and taking their heads off today and putting them in the mail, let me know.

TimmyGt

the best thing I think is to talk to someone like Summit Racing for new heads. I am trying to put new heads on my 97 GT and I think I migth just buy some new ones from Summit. I dont know what you would have to do to get the 4v heads on your ride. I would like to find that out also

MarcusM

Well, I have a 5.4 that is close to being complete. The heads themselves can be from a 4.6 or a 5.4. I think the flow is just better on the stock 5.4 compared to the 4.6. I guess I'll just google it?!?

David_K

get navi heads. thats what everybody (by everybody i mean Code3GT) woulda put on if they switched to the 5.4

code3GT

Yeah the Navigator 4V heads are the SHIATTTTTTTTTTTTTTTTTTTTTTTTTTTTTTZZZZZZZZZZZZZZZZ ZZZZZZZZZZ.

TimmyGt

How hard is it to switch to the 5.4 in place of my 4.6. Does anybody know what you need to do for parts (Like a new Tranny maybe)?

MarcusM

There aren't too pany parts that you will need, just alot of time/labor. If you have a complete 5.4 then you have half the battle right there. Getting it in, a hood to fit, exhaust to line up, a tune.. More little things than anything, once you get the motor actually sitting in the car.

TimmyGt

so it uses the same Tranny? I think its like a T-45 that I have or whatever is in a 97 GT.