Owner's manual

SFM03 / SFM04
Stainless Steel header/cross-member back exhaust system for
1965-1973 Ford Mustangs
SFM03: 1965-70 2-1/2” Header-back system w/ x-pipe
SFM04: 1971-73 2-1/2” Header-back system w/ x-pipe
Thanks again for purchasing your new Stainless steel Pypes Performance
Exhaust header/cross-member back system. Please be sure to conrm all
the components in the kit were received in your shipment before beginning
installation. These kits will include (1) X-pipe kit, (2) Mufers (if purchased),
(2) tailpipes, (2) collector extensions, (2) mufer hangers, (2) tailpipe hang-
ers, (8) clamps, and (1) bonus pack. If you purchased a kit including muf-
ers you will see the following notation after the system number: (S) Street
Pro, (R) Race Pro, and (V) Violator. If you nd any component missing,
please contact our ofce at 800-421-3890 for replacement. Installation of
this kit will require some simple hand tools; box wrenches, deep sockets w/
ratchet, extension, a saws-all and some penetrating lubricant. For a quicker
and tighter installation, air tools are recommended. Fully welding the system
is always recommended when possible. Technical assistance is available
both online at www.pypesexhaust.com or 800-421-3890. Also, our online
Installation Gallery is a great assistant during your installation,
visit www.pypesexhaust.com/pictures.html .
Pypes Performance Exhaust
2705 Clemens Road Bldg 105A Hateld, PA 19440
800-421-3890 (voice) 267-638-3507 (fax)
www.pypesexhaust.com
(A) Manifold (optional)
(B) Header (optional)
(C) Downpipe
(optional)
(D) Collector Reducer
(optional)
(E) Collector
Extensions
(F) X-pipe Assembly
(G) Mufers
(H) Tailpipes
(A)
(B)
(C)
(D)
(E)
(F)
(G)
(H)
(H)
1. Begin by placing the vehicle on a lift or four jack stands at maximum height to
aid in an easier installation. To help ease the installation, pre-t all the components into a
complete system on your garage oor, using the diagram provided.
2. Remove the existing exhaust system from the headers or exhaust manifolds back.
You can also remove any hanger mounted to the frame as your new kit includes factory
reproduction hangers.
3. Now, install your new components. Begin by test installing your new tailpipes.
Since this system uses universal style hangers, you will need to nd an appropriate
location to mount them. We have also included spoon style tailpipe hangers which can
be used close to the bumper if the factory rubber hangers are still present. The mufer
hangers will get mounted to the rear seat pans just in front of the rear. If you so choose,
custom hangers may be fabricated, let your creativity shine.
4. Now, install the mufers. The inlet should be closest to the drive shaft and the
outlet should be towards the rockers of the car. The clamp attached to the hanger at the
backside of the mufer will be the only connection clamp used.
5. Next, install the x-pipe. This is where trimming of the tubing may be required for
the optimum t. Install the xed rear legged “X” into the mufers rst. You are aiming to
have the center “X” land approx 8-12 inches behind the tail shaft of your transmission and
centered under the driveshaft. Also, the center plate on the “X” has an arrow stamp which
must point forward. Trim the rear legs as needed to put your “X” in the proper location.
Quick tip: If the rear suspension is unloaded, you can push the center “X” up until it just
about touches the drive shaft as it will never hit once the suspension is loaded. Slide the
front legs into the x-pipe. They should end somewhere close to the humps in your trans-
mission cross-member. On some applications, the front “X” legs may not be centered in
the humps but line up to your headers or down-pipes. This is ne as the system will not
hang too low. Be extra careful when measuring and cutting. A helpful tip: Line up the front
legs under the center “X” to mark your cut lines making sure to line them up with you head-
ers or down pipes.
6. Connect the front legs of the x-pipe to the headers (collector reducers) utilizing the
two 1ft collector extension pipes. Trimming the length may be required. Do not connect the
x-pipe directly to your headers. If down pipes (see down-pipe instructions) are used, make
sure they end close to the rear side of the transmission cross member. If they are too long
they must be trimmed. Some header applications require custom collectors due to the
header not ending square and parallel to the car. For proper system t, your collectors
must run parallel with your rocker panels.
7. Finish the system by making all your nal adjustments to position the x-pipe,
mufers and tailpipes. Now tighten all the clamps (Warning: tightened clamps will leave
marks in the tubing, making removal or adjustments extremely difcult) or for the best t
weld all the slip joints. Stainless steel can be welded with your standard mig welder, and is
highly recommended when possible.
Nowit’stimetoreupthatmusclecarandenjoyyour
new Pypes Performance Exhaust.