i have a 2000 f150 5.4 Lariat. theres a true dual x pipe exhaust with the two rear cats deleted. i was thinkin of gettin magnaflow high flow cats to replace the front ones. is there a number i need when ordering these or how do i know that im gettin the right ones that will work on my truck?

 

i have 94106's with the gotts mod (to keep the check engine light off) 1 per pipe

 

where'd you get those from?

 

i got them from a warehouse seller on ebay $65.10 a piece

 

well the cats i wanna replace are the pre cats. the first two. so does that change it?

 

i replaced all 4 of mine with only 2..instead of having 2 cats per side i have 1

so it wont really matter...just depends on how loud you want the exhaust basically

 

I think that the consensus on here is that there is very little loudness difference between a precat and a high flow cat

But if the 94106s are to be ordered the best place to get them is Performance Peddler with an offer code of "bestoffer4em" or "clubgp" or whatever code they send you. Just go the the 94106s page and make an offer instead of adding them to your cart. I got mine for around $95 for two.

 

Correct, there really isn't going to be that much louder.

 

X3. The precats are smaller than highflows...

 

ok. if i just took the two cats off and had none is that gonna mess with me engine? see my two are running bad they aren't very good so i wanna either get rid of them or replace them cuz they make noises and stuff. so im tossed between getting high flows or just taking them off?

 

i wouldnt run without converters unless you get a tune..

 

^ Or do the Gotts mod...

 

what does the gotts mod mean? or what is it

 

This thread explains it.

Gotts O2 Mod with Pics