How to Install Borla 3 in. Cat-Back Exhaust - Black Tips on your Mustang

1. Lubricate hangers and rubber isolators.

2. Loosen the front band clamps shown located just behind the H-pipe. (See Figs.1 & 2)

3. Loosen the clamps located just in front of each muffler assembly.

4. Beginning with the left (driver) side muffler, using a flat blade screwdriver, pull the clip to disengage it from the pipe. (See Fig. 4)

5. Remove the left (driver) side over axle pipe by removing the front of the pipe first then sliding it out of the muffler assembly.

6. Repeat steps 3 thru 6 for the removal of the right side over axle pipe.

7. On left (driver) side muffler assembly, remove the hangers from the rubber isolators and remove the muffler from the vehicle.

8. Repeat step 9 for the removal of the right (passenger) side muffler assembly. 

1. GT500 ONLY: Measure/mark a line that is 14” from catalytic converter on the factory H-Pipe, both sides. Carefully make a straight cut on each pipe and remove factory H-Pipe. Carefully de-burr edge and remove any metal shavings from the pipes. (See Fig. 5) MUSTANG GT ONLY: Loosen and remove (2) factory ball clamps on catalytic converter pipes. Carefully remove factory H-pipe connection to these pipes. Install Flair Nipples using (2) factory ball clamps, tighten bolts 32-35 ft. lbs. (See Fig. 6)

2. Place a 2.75” Accuseal clamp over each end of the expanded end of the Xpipe and insert into Nipples. Lightly tighten clamp. **PLEASE REFER TO DRAWING ON PAGE 2 ** (See Fig. 7)

3. Place a Accuseal Clamp over the expanded end of the (driver side) L/H Over Axle Pipe and position curved end of pipe over axle. Insert end it into X-Pipe and center clamp over pipe seams. Lightly tighten clamp.

4. Place a 3.00” Accuseal clamp over each end of the expanded end of L/H Muffler Assembly and insert expanded end into L/H Over Axle Pipe inlet. Insert hangars into OE rubber isolators and lightly tighten clamp. (See Fig. 7)

5. Repeat steps 3-4 for the installation of the R/H Over Axle Pipe and R/H Muffler Assembly.

6. Check your exhaust system for proper clearance under the vehicle and also for tip alignment. (See Fig.8) 7. Once position has been determined to be correct, tighten the Accuseal™ clamps to 32-35 ft. lbs.

7. Before starting your vehicle, make sure to check all wires, hoses, brake lines, body parts and tires for safe clearance from the exhaust system.

8. Start vehicle and check for any leaks. If any leaks are found, determine cause (such as loose or incorrectly positioned clamp) and repair as necessary