Manual

SGA30/ SGA31/ SGA29
409 Stainless Steel header/cross-member back exhaust system for
1964-1972 GM A-bodies
(Traditional dual exhaust, no crossover section)
SGA30: 2-1/2” w/o x-pipe
SGA29: 2-1/2” w/o x-pipe 70-71 GTO only
SGA31: 3” w/o x-pipe
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 mani-
folds 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 installing, the new tailpipe hang-
ers. These holes are located approx 12-16” forward from the rear bumper, on the
outside of the frame rails. Next, the mufer hangers install just forward of the rear
end housing to the cross-member which is perpendicular to the frame rails. Your new
hangers have two rubber straps with three holes each. They install as follows: the
vertical strap gets bolted through the middle hole to the cross-member parallel to the
oor towards the outside of the car. The horizontal strap gets bolted through the top of
the cross member by wrapping the rubber strap into a “C” shape. The bolt will need to
go though the top hole in the strap. Next, install a complete clamp on each hanger.
4. Install the two tailpipes on to the clamps you just installed on the hangers.
Snug the nuts to hold the tailpipes in place. Your new tailpipes will not require trim-
ming unless installing tips.
5. 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.
6. Next, install the down-pipe extensions. This is where trimming of the tubing
may be required for the optimum length. Slide the extensions into mufers. The ex-
panded portion of the extensions should land close to the humps in your transmission
cross-member.
7. Finish the system by connecting the down-pipe extensions to the headers
(collector reducers) utilizing the two 1ft extension pipes. Trimming the length may be
required. If down pipes(see down-pipe instructions) are used, make sure the tubing
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 in the car. For proper system t, you col-
lectors must run parallel with your rocker panels.
8. 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 409 stainless can be welded with your stan-
dard 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.
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) Extension Pipes
(F) Downpipe
Extension
(G) Mufers
(H) Tailpipes
(I) Tips or Turndowns
(optional)
(A)
(B)
(C)
(D)
(E)
(F)
(G)
(H)
(I)
Thanks again for purchasing your new 409 stainless steel Pypes Perfor-
mance 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 (2) down-pipe extensions, (2)
Mufers (if purchased), (2) tailpipes, (2) extensions pipes, (2) mufer hang-
ers, (2) tailpipe hangers, (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 com-
ponent 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 lubri-
cant. For a quicker and tighter installation, air tools are recommended. Fully
welding the system is always recommended when possible. Technical assis-
tance is available both online at www.pypesexhaust.com or 800-421-3890.