Hey guys im going to be putting on a magnaflow exhaust sysetm along with an AEM intkae kit on my 5.4 1997 expedition. I was also looking at the bbk 75mm throttlebody. My question is will it make that big of a difference. Would i feel the difference or would it just be unneccessary for my minor mods?

 

i dont think you will feel much of a diffrence, both these mods will help your top end of the RPM range and it is hard to feel small diffrences up there. also you will need to port out the uper intake to mach the new throttle body. good luck.

 

I ported my upper intake, I could for sure tell a difference in throttle response...

 

Hey Built54, if you don't mind me asking, how much did it run you to port the upper intake? Just curious

 

it is something you can do yourself with a grinder, and to polish it up you can use a drill and a polishing wheel and aluminuim polish, good luck