Pypes Performance Exhaust SGG50 - Manual

SGG10/ SGG12/ SGG13/ SGG50/ SGG53
Stainless steel header/cross-member back exhaust system for
1978-1988 GM G-bodies
SGG10: 2-1/2” w/ x-pipe, side exit tailpipes *
SGG12: 2-1/2” x/ x-pipe, SS style straight back tailpipes *
SGG13: 3” w/ x-pipe, SS style straight back tailpipes *
SGG50: 2-1/2” cat-back, side exit tailpipes
SGG53: 2-1/2” cat-back, SS style straight back tailpipes
* (Double hump cross-member required)
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-fit all the components into a complete system on your
garage floor, using the diagram provided.
2. Remove the existing exhaust system from the headers, exhaust manifolds back or the cata-
lytic converter. You can also remove any hangers as your new kit includes new hangers.
3. Now install your new components. You will be starting from the back of the car and working
your way forward. Begin by installing the new tailpipes. Your new tailpipes will not require trimming
unless installing tips. These kits have two tailpipe options: Side exit (Grand National style) or Straight
back (SS style). Below, are the proper instructions for each style:
• SS style: Temporarily hang the tails over the rear axle, slide the provided spoon hanger
into the factory mount located on the frame rail close to the bumper. Using a clamp, attach the spoon
hanger to the tailpipe. Slide the mufflers onto the tailpipes placing a support under them. You will be
clamping a hanger to the back of the muffler neck and attaching it to the under body of the car. In some
applications, your factory hangers may be used.
• GN style: Temporarily hang the tailpipes over the rear axle. These tailpipes utilize factory
mounting holes located on the frame rails near the rear tires. Place the rubber tailpipe grommets onto
the “L” shaped hangers, slide the bolt through the hole and thread them into the frame rails. If factory
holes are not present, new ones will need to be drilled. Slide the mufflers onto the tailpipes placing a
support under them. You will be clamping a hanger to the back of the muffler neck and attaching it to
the under body of the car. In some applications, your factory hangers may be used.
4. You have just slid the mufflers on to the tailpipes. 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 muffler will be the only connection clamp used.
5. Next, install the x-pipe or converter back Y-pipe.
• X-pipe version: This is where trimming of the front legs may be required for the optimum
fit. Install the rear legs into the mufflers first. Your center “X” should be positioned approximately 8-12
inches behind the tail shaft of your transmission and centered under the driveshaft. Also, the center
plate in the “X” has an arrow stamp which must point forward. Slide the fixed rear legs into the mufflers.
Next, slide the front legs into the x-pipe. They should end somewhere close to the humps in your trans-
mission cross-member. These may need to be trimmed to fit the width of your headers or optional
down-pipes. 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.
Finish the system by connecting the front legs of the x-pipe to the headers (collector reducers) utilizing
the two 1ft connection pipes. Trimming the length will be required. If down pipes are used, make sure
the 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 in the car. For proper system fit, you collectors must run parallel with
your rocker panels.
• Y-pipe version: The supplied y-pipe will get bolted to the factory cat and the
clamp to the installed mufflers. If your car has a different flange on the cat, you will need
to utilize our PVC10 cat delete pipe for its flange and piping.
6. Finish the system by making all your final adjustments to position the mufflers
and piping. Now tighten all the clamps or for the best fit weld all the slip joints. The stain-
less steel can be welded with your standard mig welder.
Now it’s time to fire up that muscle car and enjoy your
new Pypes Performance Exhaust.
Pypes Performance Exhaust
2705 Clemens Road Bldg 105A Hatfield, 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) Cat-back Y-pipe
(H) Mufflers
(I) Tailpipes
(A)
(B)
(C)
(D)
(E)
(F) (G)
(H)
(I) (I)
Thanks again for purchasing your new Stainless steel Pypes Performance Ex-
haust header/cross-member back system. Please be sure to confirm all the com-
ponents in the kit were received in your shipment before beginning installation.
These kits will include (1) X-pipe kit, (2) Mufflers (if purchased), (2) tailpipes, (2)
collector extensions, (2) muffler hangers, (2) tailpipe hangers, (8) clamps, and
(1) bonus pack. If you purchased a kit including 409 stainless mufflers you will
see the following notation after the system number: (S) Street Pro, (R) Race Pro,
and (V) Violator. If you find any component missing, please contact our office 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, www.pypesexhaust.com/pictures.html .