EFI manifolds

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Mar 10, 2006 | 06:22 PM

Bullride_101

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Joined: Jan 2006

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From: Medford, Oregon

EFI manifolds

When using the EFI exhaust manifolds on a carbed 1986 300, do you have to use 2 exhaust systems, one for the front and one for the rear manifolds? I guess I hear alot about it, but never really understood how it all goes back together. Thanks

Mar 10, 2006 | 06:36 PM

1982fordf100

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Joined: Sep 2003

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From: SE, Michigan

There is two options when using EFI exhaust manifolds. Either a walker downpipe which I have a picture of mine or use the stock pipes from an EFI truck. The stock pipes from an EFI truck have two separate pipes about 1 3/4 of an inch in diameter that are separate before going into the first cat by the O2 sensor. After they go into that cat they come out as a single pipe from there back. If you go that route you can get all that stuff from a junkyard along with the EFI exhaust manifolds. Once you get that stuff just cut it off before the cat and you'll have two separate pipes. If you go with the the walker downpipe it connects the two manifolds together into a single 2 1/2 inch pipe. I bought it simply for ease of connecting the two manifolds. Its not a performance piece. I haven't put it on my truck yet though, still collecting parts. Heres a picture of mine though hooked up to my EFI exhaust manifolds. Hope this helps.

https://www.ford-trucks.com/user_gal...=78327&width=2

Mar 10, 2006 | 07:10 PM

Bullride_101

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From: Medford, Oregon

Thanks, that helps alot. Do you know the best place to locate a walker pipe?

Mar 10, 2006 | 07:27 PM

havi

I'll have the Roast Duck

Joined: Jul 2002

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From: Northshore, MN

got mine at the local bumper-to-bumper