User Manual

Pypes Perfor mance Exhaust
2880 Berge y Road Unit O Hatfield, PA 19440
800-421-3890 (voice) 215-712-9968 (fax)
www.pypesexhaust.com
SFM50 / SFM54
409 St ainless S teel Ford Must ang V6 Cat-Backs
SFM50: 96-04 3.8L V6 w/ turndown tails
SFM54: 96-04 3.8L V6 w/ 3” slip-fit tips
Thanks again for purchasing your new 409 stainless steel Pypes Performance Exhaust Ford Mustang cat–back
system. Please be sure to confirm all the components in the kit were received in your shipment before beginning
installation. These kit s will include (2) Street Pro Mufflers, (2) tailpipes (1) Y-pipe, (4) clamp s, (1) bolt kit and (1)
hanger kit. SFM54 will also include (2) 3” slip-fit tips and (2) tip hangers. If you find any component missing,
please contact our of fice at 800-421-3890 for replacement. Inst allation of this kit will require a few simple tools;
jack stands, 9/16” wrench, deep socket w/ ratchet, 1/2” wrench and a saws-all or hack saw. For a quicker and
tighter installation, air tools are recommended. Technical assistance is available both online at
www.pypesexhaust.com or 800-421-3890.
1. Begin by placing the vehicle on a lift or four jack stands at maximum height. This will aid in an easier
installation. Note: Removal of the rear tires will allow the t ailpipes to go over the rear axle much easier.
2. Unbolt the factory cat-back from the rear of your y-pipe. Next, remove the two clamps at the muf flers. If
you still have a factory system on the car, you will need to cut the muf fler out of the system using a hack
saw or a saws-all. Finish by removing the tailpipe from the rubber hangers. Pypes Performance Exhaust
has supplied a new HFH30 hanger kit. The two hangers with diamond shaped rubbers get mounted in the
factory locations near the rear axle. The two rect angular blocks get mounted under the rear bumper. The
vehicle should have stamped holes to accept the supplied clip nuts and hardware. If your rear bumper is
not stamped with the correct holes, you will need to drill ones to mount the supplied hangers. Once all the
hangers are installed properly, move to the next step.
3. Now it’s time to install your new cat-back. Begin with the t ailpipes first, slipping the t ailpipe over the rear
axle. Once over the axle portion is in-place, slide the wire form hangers through the rubber hanger on the
car, which you have just inst alled. If you purchased a kit with 3” add-on tips, slide the tip s on to the t ails
and slide the additional hanger through the boss on the tip. Now install the hangers into the rubber
mounts. A small amount of grease or liquid soap will allow the hanger to slide through easier.
4. Next, install the mufflers on to the tailpipes. These kits were supplied with offset/ center mufflers. The
center inlet must point towards the front of the car. Again, a small amount of grease in the muffler inlet and
outlet will allow for easy rotation when adjusting for the perfect fit.
5. Next, install the y-pipe into the inlets of each muf fler. A small amount of grease will also help here too.
Some V6 years may require the supplied y-pipe legs to be cut shorter . Connect the flange on you new
system with the factory y-pipe and snug the nuts. Now install the four clamp s on the muffler necks, snug
the nuts, but DON’T TIGHTEN. Once these clamp s are tightened you will not be able to adjust any of the
components
6. Last, make all your final adjustments for fit. Make sure the muf flers are flat and p arallel to the ground.
Rotating the muf flers and t ailpipes slightly will get you the best fit. Also, make sure the t ailpipes are
positioned in the correct location under the rear bumper. Once you are satisfied with the fit, tighten all four
clamps, tip hardware and the connection points at the y-pipe. Air tools will allow the tightest clamping
possible. Now it’s time to fire up your mustang. Remember to listen and check for exhaust leaks. Also,
periodically check all connections points as they may come loose.
Note: Black residue at any of the connections indicate an exhaust leak.
Enjoy your new Pypes Performance Exhaust.