I've had the 45166 on order at summit since mid April. I've checked all the local parts stores and shops, and online everywhere I can think of, including ebay. I called walker and they said they are not available and the factory has no future builds planned.

Tom

 

Get a factory head pipe(s) from a salvage yard, cut it off where they go into the cat, and adapt it to your exhaust system. Much better.

 

I have a brand new, tags still on it, never bolted on, Walker Y pipe. PM me if you're interested.

 

I bought a parts truck this morning with everything I need on it. Thank you for your offer.

Tom

 

F250- I left you a message regarding the Walker y-pipe on your "Visitor Messages" page. I can't seem to find a way to PM you.

I'd like to get that Walker Y-pipe if its available.

 

I might be interested.

 

I just got a 45166 from Rockauto. I guess they make them on occasion.

 

Jeggs just shipped my Walker Y pipe

 

I have seen in other posts that you have to be careful with these - many have reported that when they looked at the rear connector that they have found very small ports cut in the pipe and have had to open them up quite a bit. I checked mine and it was fine, but some have reported finding holes as small as 3/4" in their pipe, and have had to grind the hole open. Easy to fix while the pipe is off, a bit more of a problem (plus screwing up the uniformity of back pressure to the rear cylinders) if you forget to check/repair.

 

Yes, the quality of the Walker pipe is erratic. Clean it up as necessary, or even better, get the twin pipes from the original OEM cats and use them. They are heavy wall, low grade stainless and will outlast inferior pipes.

 

I also have a Walker Y pipe in my pile of parts and had intended to use it in one of my Bullnose trucks. I did search for new dual pipes like FTF notes above and all I can find new is the system here:

WALKER® EXHAUST SYSTEMS :: E-Catalog Lookup

This is the Walker page, but it comes up on Advance Auto and other parts pages. (Advance Auto wants $417.99: Walker Converter - Ultra Direct Fit 40633: Advance Auto Parts)

Magnaflow offers a high flow version, but again it's the system back to a certain point and it's pricey:

Buy MagnaFlow DF Converter 447245 at Advance Auto Parts

The point being that to get the separate head pipes new, it looks like you have to spring for the whole setup. Something I saw on my local Craigslist that has me thinking was a late model 5.0 Coyote engine Mustang exhaust stock setup someone had replaced. It has a 2 in/2 out cat that I would think would have plenty of flow. I see them as near new take offs, so my thoughts were to find one of them, use, or have made, the stock dual headpipes to this cat, then a hi flow "Y" and go to an appropriate bigger pipe single in muffler in the back.

For the price of a new stock setup or less, could mix and match some components and come up with something pretty free flowing vs the Walker Y pipe, altho the simplicity of the Y pipe for certain situations would do the job pretty well.

 

I meant to take a used set off a boneyard vehicle. The ones I have removed have had very little corrosion on them. Then you can add a transition collector 2-into-1 if you want a single exhaust.

 

I understand, altho at least in my area some of those trucks are getting picked over when you can find them. Figure the newest one is 20 yrs old.

I guess I searched for new as the original thread was about availability of new Walker Y pipes.

Next JY trip I make will make sure to look for the duals; I have 2 sets of EFI manifolds already.

 

Last night I went looking for Y pipe that I could use the EFI manifolds with and when checking the web auto parts sites no head / Y pipes come up??

Then I started looking at converter/cat and found what I needed all be it the pipe came with the cat.
I was turned on to Rock Auto's Walker 15739 for a Y pipe single outlet setup.
1988 FORD F-150 4.9L 300cid L6 Catalytic Converter | RockAuto
More Information for WALKER 15739__

Rock Auto has one a little cheaper but looks like the cat is made as part of the pipe and I don't plan to run a cat and why I went with the Walker.
I want to run this setup into the 81 stock intermediate pipe/muffler/tail pipe assy.

Posted as it may help others when looking for the Y pipe look under cats.
Dave ----

 

Yuh, I get that.

Auto manufacturers have to guarantee that all their emissions components must perform acceptably well for at least 50,000 miles. (ed: I think its 50,000 miles - it may be 100,000 miles by now.) That means that if an emissions related part fails before 50,000 miles the manufacturer is responsible for replacing it. The head pipes ahead of the catalytic converter are considered an emissions related component since if they fail the cat will not function. Pipes behind the cat are not considered emissions related and are therefore not as robust as the head pipes. So the head pipes are made from thick walled low grade stainless - similar to cat bodies - to assure they will last a long time. Aftermarket pipes are not built to as high of standards. All of the head pipes I've cut from the inlet of the cats had very little rust and were about 1/16" wall thickness. That is why I like to recommend them. Well, that, plus they are better built than any aftermarket Y-pipe I've seen, some of which are poorly mitered at the weld joint and are ill-fitting.
What Is needed in my opinion is a simple, inexpensive "merge collector" to efficiently join the two factory head pipes into a single outlet.