Can anyone tell me if 2001 5.4l manifolds will fit on my '97? I know they are different part numbers and have a slightly different design. However, if you order headers there's only one part option. This leads me to believe that they have to have the same bolt pattern/gaskets/EGR tube inputs/etc. Anyone have any experience with this?

Thanks, all.

 

I put newer manifolds (from lightning I'm told 99+) on my 97 Expy 5.4l. They bolted right up. They look more "flowing" like headers, but bolting an spacing was the same. Take note the recent (~1 yr ) TSB that says use stainless bolts and nuts. Good luck Mark

 

thanks for the info. hopefully I'll have the new headers put on in a week or so.