Exhaust Question

Black69F250 · Post by **Black69F250** » Tue Oct 20, 2009 11:28 am

Does anyone know what the pipe size is on a 360 390 engine? I am looking for the spec on the outside diameter of the pipe coming from the manifolds to the muffler.

Thanks

fordman · Post by **fordman** » Tue Oct 20, 2009 1:56 pm

2 1/2 is the size used. i have no idea if that is outside or inside measurements.

Black69F250 · Post by **Black69F250** » Tue Oct 20, 2009 2:54 pm

Thanks... That's most likely the outside measurement. The muffler will be 2 1/2 inside to be able the slip over the header pipe.

sideoilerfe · Post by **sideoilerfe** » Tue Oct 20, 2009 10:27 pm

The exhaust pipe going to the muffler is 2 1/2. If you buy a muffler with a 2 1/2" inlet it will slip right over the pipe.

fordman · Post by **fordman** » Wed Oct 21, 2009 3:25 am

to updat emore on my situation. i was looking through the diagrams. and it seems the f250 f350 and 4wd all use the same pipe as my f100 4wd. i checked every part store in town. and onl one can special order the pipe. if i tell them it is a 73 f350 4wd. because the eninge is a 73 and the front axle is a 74. if i try for 71 f350 4wd i get nothing as far as a part. is there a difference in the 73 manifold vs the 71 drivers manifold? that is all i can think of as far as the difference. i have the 73 and up drivers manifold.

1970F100 · Post by **1970F100** » Mon Oct 26, 2009 7:25 pm

A related question - I have a 1970 F100, 360, 2wd - this is a helpful thread, b/c my muffler & tailpipe fell off yesterday - I can get the right size muffler & tailpipe, but not sure how to attache the muffler on the front end - the pipe is there, intact, no rust, just nothing to bolt to

fordman · Post by **fordman** » Mon Oct 26, 2009 7:50 pm

all of the mufflers and tailpipes are held on by muffler bracket hangers. where ever you can botl them to is goignt o hold it up. usually the hangers are in places such as the frame and rear cab mount crossmember. as well as other places. http://www.fordification.com/tech/image ... aust03.jpg

1970F100 · Post by **1970F100** » Mon Oct 26, 2009 9:24 pm

Thanks - got that part - familiar with loose hagars and such - but how do I connect the muffler to the pipe coming back from the Y pipe?

fordman · Post by **fordman** » Mon Oct 26, 2009 9:59 pm

one fits inside the other. if you cant find an orginal get a glass pack. i guess.

1970F100 · Post by **1970F100** » Tue Oct 27, 2009 9:34 am

ok - just slips in - no need to weld?

fordman · Post by **fordman** » Tue Oct 27, 2009 12:51 pm

a clamp

1970F100 · Post by **1970F100** » Tue Oct 27, 2009 5:04 pm

Duh! Thanks!

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