3FE Down Pipe Outside Diameter (1 Viewer)

[ThePookieBear]

Hey guys, I'm at work now and don't have a set of calipers here or at home. If someone has a few minutes could they run outside and check the OD of the downpipes just before they go into the Cats. This is for a 3FE. They are pretty small, but I'm not sure what size exactly.

Thanks, Michael.

 

[ThePookieBear]

ttt.

 

[M23TLC]

Not sure man but I have spent some time looking at these lately as I'm replacing them and the cats soon. I'm going to guess 2"

 

[ThePookieBear]

We don't have any smog tests or inspections here so I'm ripping off the cats and muffler. Then I'm just doing a single 2.5" straight pipe. But... I need to weld up a y-pipe that goes from the two downpipes into a single 2.5". Guess I'll just purchase some calipers unless someone can get a sure measurement... . Looks smaller than 2" to me, but I'll try to figure it out. If anyone knows... throw it out please.

 

[onewhippedpuppy]

Let me know how that goes. I've already removed my EGR and air-pump, the cats are the last to go. I'll probably cheap out for now and just gut them. Who do you have doing the work?

 

[Lka1988]

They are definitely smaller than 2".

I'd say OD is roughly 1.5". I could run out and check, but it's really cold and snowing...

 

[ThePookieBear]

onewhippedpuppy- I'm just doing it myself. Cheap. .

Lka- Yeah, it was cold here, but now everything is melting and soaked so that sucks. Oh well.

 

[onewhippedpuppy]

That makes sense. I've often wondered who I could find to do a catless exhaust system due to the, ahem, legalities of the situation.

 

[ThePookieBear]

Yeah, I've checked around quite a bit. Nobody will touch it. Most places I ask about that and valve adjustments on the old pushrod motor look at me like I'm a moron. So I'll just weld up a y-pipe and throw down some straight pipes.