Done a search for this also and cant find my answer.

I am ordering Carsound High flow cats and need to know the size and also do I need the air pipe or whatever it is.

Feeling stupid!!!

 

NO - you DON'T need the air pipe. Don't get it.

2.5" inlet and outlet. The universal fit ones work just right

 

OH yea, I forgot...

You may also want to order the 45 degree mandrel bend 2.5" pipes from JC Whitney while you're at it - in case you muffler shop doesnt mandrel bend their pipes (most dont). They're real cheap from JC Whitney, btw..

 

Thanks-
I love this place

 

Are you sure those are not 90 degree?

Going with the same concept as Hankfan.....

https://www.f150online.com/forums/sh...highlight=cats

 

Looking at it, I bet the 90's will work as well. The shop I took mine to didn't have that much problem getting the 45's to align.

They're REALLY cheap to buy (again, JC Whitney), so it couldn't hurt to have both and let your shop figure out what works best. I think they were only like $7/ea for the piping...

 

That is what Ill do. Thanks Again!!!!!!

 

No prob - glad I could help.

...I also remember being able to search the online JC Whitney catalog