I know I should place this topic in the exhaust section. But I have noticed more people for the NBS f150s are here! so anyways


I have the 05 f150 5.4! I wanted opinion on what you thought of my plans for

2 Hi flow cats, X pipe, 2.5 inch piping, no mufflers and tips!! I was going to do that but I can't fully decide! and what are your views on glass packs..TIA

 

Sounds good to me..... Do you mean to eliminate the rear set of cats and replace the upstream set with hi-flows?

Anyways, dont go any higher that 2.5 inch... dont need 3"!

 

It’s going to be loud with just two hi-flow cats and no mufflers. Four cats are what make these 5.4 sound so tame.

Go for it, you can always put mufflers on later if you need to

 

Strait pipe all the way baby. You will love it. Add the mufflers later if it's to loud for you. I did it and it's not very loud in the cab at all.

 

IT would seem to be that only two cats would make it sound really randy.....

I could be wrong.

 

Back to F150online.com after bad mouthing us on another forum?......

 

What are you ^^^^^ talking about?