hey, i am looking to possibly get high flow cats like maganflow is good i hear. how many do i need? whats the best place to go through to buy them? its for a 2000 f150 5.4l
can someone give me some advice on this
thanks!

 

You only need two. The two places I know of are Troyer and Ebay

 

and that should pass emissions for inspection?
how do i figure what size i would need?
thanks for the help man

 

4W,

I will be putting on some high flow cats within the next two weeks. I'll let you know if my CEL shows up. Magnaflow claims replacing the four stock cats with two of their high flows will not trip the CEL. We will soon see.......

Here's the Troyer site with the different model numbers (I bought 94306):

http://www.troyerperformance.com/cgi...c%20Converters

Later

 

standard piping size should be 2.5", and you shouldn't fail inspection with it.

 

my truck burned cleaner and sounded much better with these, great investment!

 

Same here - No light..

 

thanks guys

 

no cats/ o2 sims. No light smells good to!

 

Do you have to build a new Y pipe? seems like the second stock cat has the bend in it. Got any pics of of your Y pipe Brew. I got back In town last night, Im gunna get you those pics for you this weekend, finally got cold enough to hide in the garage without the wife nagging me about doing crap to the yard.

 

My cat's are after the Y before the muffler - they won't fit between long tubes and the Y unless you have a welder and a 3" ID cat flange.

To anyone ordering Pace Setter Long tubes - make sure you order the 3" cats - because it's very tight in between..

 

forgot you had long tubes. I can weld exhaust, just wanted to check out one that is already done. If I have to weld new bends in Im just going to build a new Y pipe I think.

 

Pace Setter charges $125 for the 3" off road pipe you can get included with their headers - I didn't have a welder - I returned the 3 " off road pipe and used stock. Plus their off road pipe doesn't include O2 ports which pi$$ed me off because their picture of the kit SHOWED an O2 ported Y-Pipe. It was total false advertising on there part!!!! Carfull with Pace Setter - they are a$$holes to deal with..

 

why do you need cats? i got a down pipe that got rid of them running true duels with mufflers. im just wonderin why you would need cats at all.

 

I would run no cats, just worried about catching a code. How long you been running felineless shifty?