Installation Time: (approx) 2 Hours
XFM10/XFM30: 79-86 LX, 87-95 GT (79-86 owners require a dual hump cross-member)
XFM13/XFM33: 96-98 GT
XFM16/XFM36: 99-04 GT
XFM19/XFM39: 96-04 V6 (GT style cat-back and 24” o2 extenders are required)
Thanks again for purchasing your new 409 stainless steel Pypes Performance Exhaust Ford Mustang off-road or street legal xpipe. Please be sure to confirm all the components in the kit were received in your shipment before beginning installation. All kits will include your new x-pipe with 02 bungs, installation hardware, and header sleeves (if required). If you purchased a street legal version, you should have also received a CVM10K or CVM11K cat kit. If you purchased XFM16, you received (1) small sleeve for the drivers side leg. If you purchased XFM19, both mounting points at the headers require the (2) small sleeves supplied. If you find any component missing, please contact our office at 800-421-3890 for replacement. Installation of this kit will require a few simple hand tools, a cutting device and penetrating oil. For a quicker and tighter installation, air tools are recommended. Technical assistance is available both online at www.pypesexhaust.com or 800-421-3890.
XFM10/ XFM13/ XFM16/ XFM19
Now, slide the x-pipe on to the driver and passenger down-pipes matching the ball ends to the cat-back. Re-install the factory cat-back hardware and snug tight. If hardware is necessary, you can purchase an HVC35 kit or 3/8-16 x 2-1/2” bolts, nuts and washers from a local hardware store.
XFM30/ XFM33/ XFM36/ XFM39
These 49 state street legal versions will follow the same instructions as above aside from two cuts in the down-pipes, the installation of the cats and (2) additional HVC21 band clamps. These additional instructions happen between steps 3&4 above. You will need to cut 9-1/2 inches off the back of the two down-pipes before installation. Next, install the clamps on the expanded/slotted end of the cat. Make sure the O2 sensor plugs are tight on the cats. 04 GT owners can use the cats 02 sensors and plug the ones in the x-pipe.
Finish the install by sliding the cats on to the down-pipe legs and the x-pipe into the back of the cats.
*** Federal laws prohibit the use of XFM23 for street use.
Check with local and state authorities for the legal use of XFM26 and XFM23.