Owners manual

SGT79/ SGT80
Stainless Steel header/cross-member back exhaust system for
1960-87 GM Trucks
SGT79: 2-1/2” w/ x-pipe 1960-72
SGT80: 2-1/2” w/ x-pipe 1973-87
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 hangers mounted to the frame as your new kit includes factory
reproduction hangers.
3. Now, install your new components. Begin by test installing your new side exit tail
-
pipes. These tailpipes are designed to run inside the rear trailing arms. Since this system
uses universal style hangers, you will need to determine the approximate location to mount
them. The tail pipe hangers will mount to the outside of the frame rails just behind the rear
tires. The mufer hangers will get mounted to the mid cross-member where the trailing arms
are attached. If you so choose, custom hangers may be fabricated, let your creativity shine…
4. Now, install the mufers. The mufers in the kit are designed to mount vertically
with the logos facing left to right. The center outlet will get connected to the beginning of the
tailpipes. The clamp attached to the hanger at the front side 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 rear legs into the mufers rst. You are aiming to have the center “X”
land approx 12-16 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” and mufers 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 t he suspension is loaded. Slide the front legs into the
x-pipe. They should end somewhere close to the humps in your transmission 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 headers or down pipes.
6. Continue by connecting the front legs of the x-pipe to the headers (collector reduc
-
ers) utilizing the two 1ft collector extension pipes. Trimming the length will be required. Do
not connect the x-pipe directly your headers. If down pipes (see down-pipe instructions) are
used, make sure the pipe ends 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, you collec-
tors 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. The stainless steel can be welded with your standard mig welder, and is highly recom-
mended when possible.
Now it’s time to re up that muscle car and enjoy your
new Pypes Performance Exhaust.
Pypes Performance Exhaust
2880 Bergey Road Unit O Hateld, PA 19440
800-421-3890 (voice) 215-712-9968 (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)
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 .