Convert to dual Exhaust 71 Mustang Mach1

JJHstang · Oct 27, 2018

My 71 Mach 1 has single exhaust. I would like to convert to dual. Can I just have to cut out the existing Y and connect a new H pipe, run the new pipes with new mufflers?
Where can I get the best fitting dual exhaust kits and what brand to have a nice powerful song.
The engine is a 351 winsor with 4 bbl carb.

WORTH · Oct 28, 2018

the drivers side manifold may be different on the dual exhaust if I recall correctly, unless you're going to have an exhaust shop make it.

JJHstang · Oct 28, 2018

Thanks, good to know. I just thought I could cut the Y off and hook up new H pipe. I Wil have to look closer. The time I did look both pipes running from manifolds looked the same connecting into the Y.

WORTH · Oct 29, 2018

look for an exhaust catalog online, the walker catalogs have actual pictures of the parts, you can compare the "y" pipe to the "H" pipe and see if they are the same at the engine end. If not you will need to buy the correct manifold, or have the exhaust made at an exhaust shop.

JJHstang · Oct 29, 2018

I did some searching but as usual when searching for a 1971 ford you don't find mustang as a selection and if you do the mach 1 is not a submodel listed.

WORTH · Oct 30, 2018

wont have to be a mach 1, any 71 mustang. After I posted that I took a look around and came up blank, but a couple of notes I may add. Are you sure it's a windsor? I'm not sure about '71, but in 70 a 351 4v was a cleveland, and a 351 2v was a windsor. Unless someone replaced the manifold and added the 4bbl. I actually owned a '70 Mach 1 with a 351W 2bbl , a 3 speed std. trans, and a shaker hood. All factory. Not sure what kind of person would have ordered that new, but I owned it.

JJHstang · Oct 30, 2018

It came out of the factory as a 302 2V Winsor. Someone replaced it with a 351 Winsor 4 bbl manifold. The thing was they used an adaptor and used the 2 bbl original carb. I did not know this until the card started leaking and the mechanic told me. I purchased a 4 bbl carb and had it put on.
The number of bolts on the value covers is how I know it is a winsor not a cleveland.

WORTH · Oct 30, 2018

Well I couldn't find an exhaust for it anyplace, I would find an exhaust shop and have one made.

JJHstang · Oct 30, 2018

Worth: thank you for trying to help. I will check with s9me shops.

Convert to dual Exhaust 71 Mustang Mach1

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