How to Install Pypes 3 in. Cat-Back Exhaust w/ H-Box - Fastback - Black Tips on your Ford Mustang GT

SFM80 SFM80MHB SFM80MX SFM80MXB
SFM80MH: 2015 Mustang GT H-Box Cat Back with 4" Tip
SFM80MX: 2015 Mustang GT X-Box Cat Back with 4" Tips

Thank you for purchasing your Pypes Performance Exhaust cat back system for your 2015 and up Mustang GT. Please take the time now to review these installation instructions and confirm that all the components in the kit where received in your shipment before you begin disassembly of your car. If you find a component missing or have questions about the installation please contact our technical department at [email protected] or through our live chat room found on the home page of the Pypes website at pypesexhaust.com

1. Begin by placing the vehicle on a lift or four jack stands at maximum height.

2. Unbolt your factory system cat-back by loosening the two butt connect clamps using a 15mm socket. Retain these clamps because they will be reused later in the installation.

3. Once these clamps are loose the factory system can be removed in one piece. The use of a penetrating lubricant on the factory rubber insulators will aid in this step. There is no cutting required.

4. Now it's time to start the installation of your new system. Begin by installing the two PVA12 adapters using two HCV24 clamps into the front of the HFM80/XFM80 mid-pipe. Next stall the mid-pipe assembly into the car reusing the two factory but connect clamps keeping all the clamps loose until final adjustment. Note: the mid-pipe has a support rod welded to the back of the mufflers. This rod should face the ground and mufflers tuck up nicely following the lines in the gas tanks.

5. Next, install the TFM80LF/TFM80RF tailpipe sections into the factory rubber isolators then into the mufflers using two more HVC24 clamps at that muffler. The remaining two tailpipe sections TFM80LR/FTM80RR are easiest to install by running wire form hanger through the factory rubber insulators first and then connecting the slip fit joints. Use the two remaining HVC24 clamps at this connection followed by the tips.

6. Now that everything is installed loosely you can begin the alignment and tightening process. Making sure the mid-pipe is flat and follow the gas tank tighten the two clamps forward of the box followed by the factory butt connect clamps.

7. Next tighten the tailpipe sections but only after you have the tips align in the openings of the valance. Tighten the tips and your installation is complete. Note: The use of air tools is highly recommended for these steps. 

8. Lastly, start your car and check for exhaust leaks. Condensation drips from the slip joints are normal for the first few miles of driving until the system is fully seated.

Now it's time to fire up that muscle car and enjoy your new Pypes Performance Exhaust

Make sure you test fit these exhaust components BEFORE any cutting, welding, or unnecessary bending is done. Once modified, the components of the system are NOT RETURNABLE.

If you are unsure of the proper installation procedures or fitment, please contact a qualified exhaust shop or call our tech lines toll free at 800-421-3890 or visit our installation gallery at: www.pypesexaust.com/install

One of our experienced exhaust techs will be glad to assist you in any way. Thanks and enjoy your new...
Pypes Performance Exhaust!

Warranty: All products manufactured by PPE are guaranteed to be free from defects in the materials and workmanship at the time of sale. Sound or tone is not a warrantable/returnable issue. The products are guaranteed to fit and perform on their intended applications, provided the vehicle has not been modified or suffered structural damage. When a shipment is received damaged; the consumer must contact the carrier to start a damage claim. All warranty claims must have a return authorization and will be reviewed by our claims team. At this point, it is our option to repair or replace the component. PPE reserves the right to replace any product that has been discontinued from its product line with a new product of comparable value and functionality. Under no circumstances, shall the warranty be transferrable or assignable. Any and all costs to remove and/or replace a warranted product are not covered by this warranty, inclusing the shipment to and from PPE for the replacement. Also loss of vehicle, rentals or towing is not covered. Other than the warranty described above, all PPE products are sold "AS IS" and no other warranty is implied. At any time, the terms of this warranty are severable.

***PPE catalytic converters carry a 3 year/50,000 mile limited warranty. This specific warranty covers applciations which are in good working/running order. The warranty does not cover converter failture due to poor running/performing engine, excessive fuel, nitrous oxide, superchargers, oil, anti-freeze, improper 02 sensor function, road damage or hanger breakage.

Returns: Any and all products purchased from an authorized PPE dealer must be returned to the dealer. Please review your dealer's return policy.

If the products were purchased from PPE direct, any and all returns must be accompanied by a return authorization number, original invoice, and a statement about the return. To obtain RA #, please call 800-421-3890. All non-warranty returns are subject to a 20% restocking fee, no exceptions. As the sound of the system is an opinion, it's not a reason for return. The consumer is responsible for any and all freight costs of a return as well as the shipment for exchange returns. Any products which have been modified*, cut, welded, bent, misused, damages, used on the vehicle are not subject to a return. No exceptions.
*Modifying the design or function, or subjecting this product to abuse, misuse, mishandling or unauthorized repair voids all aspects of the warranty or return policy.


A word about yoru new Pypes Performance Exhaust system...

In order to provide you with the best possible products, Pypes Performance Exhaust conducts extensive research and exhaustively (pardon the pun) tests every product we offer to our customers.

Your system or component was designed to fit your vehicle, and we pride ourselves in the knowledge that we have an excellent track record when it comes to getting things done right the first time.

Our goal is for you to have the best installation experience possible.

We've been in the automotive industry long enough to know that, on occasion, our customers may experience some confusion or indecision while installing our systems or components. If, for any reason, you should find yourself unsure of the first, last or any step in your installation, please contact us before attempting to modify any part of your system. We have in-house experts who are capable of answering any question and willing to help you get the job done as efficiently as possible.

Please don't modify any Pypes Exhaust product before talking with us about your installation because doing so will void your warranty.

Please call or contact us via e-mail before you cut, bend or modify your system. Our website also contains many great photos of installations on various applications which may speed up your time under the car.

Also, please don't forget to continually check our website for new products and monthly specials.


Pypes Performance Exhaust
2705 Clemens Road, Sute B103
Hatfield, PA 19440
Toll-free Tech line: 800-421-3890
Hours: M-F 9am-5pm eastern
Local: 267-638-5030
Fax: 267-638-3507
E-mail: [email protected]
www.pypesexhaust.com