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vintageman

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Dec 10, 2017
Messages
507
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Location
Georgia
My Car
1973 Mach 1 "Q Code"
Ordered my dual exhaust system from Summit yesterday, got it today. Great shipping time. I had thought about driving down to Atlanta yesterday but got tied up with Mother's Day so I ordered it around noon time. I got this kit:

Summit Racing SUM-680111 - Summit Racing™ Header-Back Dual Exhaust Systems​

I installed the primary pipe to my heads just now and it looks like the amount I have to cut off will be enough for me to use for the H pipe since the kit did not come with one. The bends and fitment looked great with my headers. This set will not work with headers that have an outlet that is not parallel with the driveshaft. I will probably install it with clamps, make sure it fits well, then remove it all for the welding part.

Anyone have good suggestions for the tailpipes? Are the tailpipes chrome and by the way, how far out of the valence should they stick? I have the dual exhaust valance and will post thoughts on the fitment once I get further along in the install.

Tom
 
Joined
Jan 2, 2019
Messages
172
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96
Location
Wisconsin
My Car
1972 Mustang convertible, 351C 2V with FMX (#'s matching)
Currently equipped with 351C 4V 4BM, .060 over, roller cam, Sanderson block huggers, -AC
Ordered my dual exhaust system from Summit yesterday, got it today. Great shipping time. I had thought about driving down to Atlanta yesterday but got tied up with Mother's Day so I ordered it around noon time. I got this kit:

Summit Racing SUM-680111 - Summit Racing™ Header-Back Dual Exhaust Systems​

I installed the primary pipe to my heads just now and it looks like the amount I have to cut off will be enough for me to use for the H pipe since the kit did not come with one. The bends and fitment looked great with my headers. This set will not work with headers that have an outlet that is not parallel with the driveshaft. I will probably install it with clamps, make sure it fits well, then remove it all for the welding part.

Anyone have good suggestions for the tailpipes? Are the tailpipes chrome and by the way, how far out of the valence should they stick? I have the dual exhaust valance and will post thoughts on the fitment once I get further along in the install.

Tom
I have a rear valance in its shipping bag and have not found the urge to prep and paint it and then redo my tailpipes to try to get it to match properly. It was finicky enough to redo my SS exhaust from Sanderson block huggers to an X, to Magnaflows (perfect size) and out to the rear. Regardless, I prefer turndowns but if I did have the cut out I would probably go straight thru and atleast 2 1/2" past to control carbon build up on the paint. Most importantly IMO is to tack it all together with the mounts, etc and on the sprung weight on the entire suspension. We've all seen tips that are "cross eyed" because attention to detail was hurried or not thought out. Not the greatest examples on these pics but..
 

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Bobby

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Sep 24, 2018
Messages
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Location
League City, TX
My Car
1972 Mach 1
Still waiting on my 393 Cleveland stroker build. One machine shop botched the build and another took two month to verify bore and re-hone two cylinders. The Eagle rotating assembly was not installed correctly by the original shop and a 3/8 inch spacer was not installed with the crank. The build finally complete, it took another month and a half to get it dyno'd. The dyno was successful with 473HP and 476 pounds of torque. However, the rear main burned up during dyno testing. Why would the rear main burn up? The machine shop is replacing the original Fel-Pro seal with a Mahle seal. The shop will grease it before installation. Once this is complete, I will mate it with a rebuilt AOD tranny and then swap out my old 351C 2V/C6. This process started in February 2021 when I found a 351C CJ block on eBay for $1K. Maybe one day.....
 

droptop73

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Grand Rapids, MI
My Car
73 Convertible
The rear main bearing or the seal? If the rear main "burned up" you need more than a seal. If the seal failed, why?
 
Joined
Aug 9, 2020
Messages
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Location
North Idaho & The Bahamas
My Car
1973 Mach 1
Some other Fords
....

Anyone have good suggestions for the tailpipes? Are the tailpipes chrome and by the way, how far out of the valence should they stick? I have the dual exhaust valance and will post thoughts on the fitment once I get further along in the install.

Tom
Tom-

Attached video shows stock tips and positioning which I believe to be accurate.
 

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Bobby

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Sep 24, 2018
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Location
League City, TX
My Car
1972 Mach 1
The rear main bearing or the seal? If the rear main "burned up" you need more than a seal. If the seal failed, why?
Rear main seal. Good question. Thats why I posted it. Maybe someone can offer a possible explanation.
 

droptop73

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73 Convertible
I installed my new double din radio over the weekend. I'm not sure what others have installed but this one required a bit of creative hackification to get it in. LOL!!
 

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