The photo at left shows the 71 429 CJ Mustang/Cougar
exhaust manifolds. Note that the 71 429 Mustang/Cougar
has a unique driver side manifold that is a different design from
the exhaust manifold used on the 70 - 71 429 CJ Torino.
The photo at right is a side by side comparison showing how the
Torino manifold outlet points upward while the Mustang version points
downward. This is done to avoid the steering gearboxes in each vehicle. The
71 429 Mustang/Cougar however, does use the same passenger side exhaust
manifold as the 70 - 71 429 CJ Torino.
Note that from the factory, no gasket was used between
the exhaust manifold and the head. However, older parts may not be as flat
as the originals and the gasket would be good insurance against exhaust
The unique Mustang/Cougar-only driver side manifold has
two possible cast in part numbers;
D1ZE-9431-CA1 or CA2. Note that some parts books also show the D1ZE-AA as
also being a driver side 429 CJ/SCJ, but this is incorrect - this part
number is actually for a 351 C).
For the passenger side, the part number is D0OE-9430-A. Location of
the cast in part number is shown below along with examples of both a CA1 and
CA2 Driver's side manifold;
Exhaust Manifold Heatshield
The correct shield for the 71 429 Mustang/Cougar is shown
in the photos at left and center (installed). This is a very hard part to
find today because most of these shields rusted away years ago. The photo at
right shows this shield compared to other 429 shields that frequently show
up on E-Bay as being correct (but are not) for the 71 429 Mustang/Cougar.
The photos below left and center show the studs used to attach the shield.
Note that this same shield is also used on the 70 - 71 429 CJ Torino. The
photo below right is just for fun - it is rare enough to see one of these
shields - three together is extraordinary.
The service part number for this shield is
These metal rings are the "gasket" used between the 429
CJ/SCJ exhaust manifold and the exhaust system. One is used on each side and
they measure 2 3/8" at the ID, 3 1/16" at the OD and are 3/4" thick. They
are getting difficult to find for the 429 CJ/SCJ.
The photos above are of what we believe are original 1971 429 SCJ Mufflers bearing the part numbers D1ZA-5232-BC
and D1ZA-5230-EB. A set of
original muffler hangers are below at right as well as installed views.
429 H Pipe
These pictures show an original 429
Mustang H pipe. Below is an installed view showing the flattened sections (presumably to meet
vehicle ground clearance requirements).
An NOS system for a 71 429 CJ Mustang is shown above
(courtesy of Bob Perkins E Bay auction). Bob's auction comments about the
system are below;
"NOS 1971 Mustang
Mach 1 muffler assembly's for 429CJ. Ford part numbers D1ZZ-5230-F,J. Both
mufflers have the Ford oval and engineering number in the muffler. Note the
stop/alignment tab on the tail pipe. This is the reason for left &
right chrome tips with unique part numbers from Ford."
A system from a 71 429 Cougar is shown above.
Tail Pipe Hangers
Above are shown the correct 71 Mustang tail pipe hangers
used on both 351 (dual exhaust) and 429 applications. An installed view is
shown at top right. Below is a close up of the hook at the top of the
bracket where the bracket bolted to the car frame. There was a hole in the
vehicle frame and the hook went into the hole to locate the bracket.
These are the chrome exhaust tips that came on 429
Mustangs (Part # D1ZA-5202-BB and D1ZA-5203-AB). The original right
and left exhaust chrome tips, and their original tail pipes, had indexing
features on them so that just the right hand chrome tip fit on the right
hand tail pipe, and the left hand tip fit only on the left side. This was
done so that the tailpipes clamp screw point, pointed away from the gas
tank and not towards it. Original chrome tips were a right and left
assembly, and had two different part numbers because of this.
Correct Exhaust Tip Positioning
We believe the positioning of the chrome tips shown in
the photos above is the correct factory location. They are close to the valence
cut-outs at the tops and sides of the tips. Also, the length of the
tip sticking out beyond the valence is correct too.
at left shows an installation shot of the chrome exhaust tips used on the rear of the Mach
1 with the special
rear valence with cutouts. The photo at right compares an original valence to a