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How to Install a Borla ATAK Catback Exhaust on your 2010 Mustang GT

Tools Required
  • 3/8" Drive Ratchet
  • 3/8" Drive Extension 3"
  • 15mm Socket
  • Pry Bar
  • Flat blade screwdriver
  • Spray Lubricant
American Muscle
Shop Parts in this Guide


Borla Performance Cat-Back ™ Bill of Materials


1. Left over axle pipe

2. Right over axle pipe

3. Left muffler assembly

4. Right muffler assembly

5. 2.50” clamp (qty 2)

140318 / 140329

1. Left over axle pipe

2. Right over axle pipe

3. Left muffler assembly

4. Right muffler assembly

5. 2.50” clamp (qty 2)

Caution!!!Neverwork on a hot exhaust system. Serious injury in the form of burns can resultIf the vehicle has been in use and the exhaust system is hot, allow vehicle to cool for at least 60 Mins. Always wear eye protection when working under any vehicle.

Note: It is our recommendation that you use a hoist or hydraulic lift to facilitate the installation of your new Borla Performance Cat

-BackÔExhaust System.

Taking all under car safety precautions, lift the vehicle using a hoist or hydraulic lift. Once this has been done, you may begin the removal of your old exhaust system from your vehicle.

Note: Before removing the original exhaust system from your vehicle, please compare the parts you have received with the bill of materials provided on the previous page to assure that you have all the parts necessary for the installation of your new Borla Performance Cat-BackÔExhaust System.

Original Exhaust System Removal

Note: With a used vehicle, we suggest a penetrating spray lubricant to be applied liberally to all exhaust fasteners and allowing a significant period of time for the chemical to lubricate the threads before attempting to disassemble.

1. Loosen the clamps located just behind the h-pipe. (See Fig. 1)

2. Loosen the clamps located just in front of each muffler assembly. (See Fig. 2)

3. Beginning with the left (driver) side, using a flat blade screwdriver, pull the clip to disengage it from the pipe. (See Fig. 3)

4. Remove the left (driver) side over axle pipe by removing the front of the pipe first then sliding it out of the muffler assembly. (See Fig. 4)

5. Remove the factory clamp for use during the installation of your new exhaust system.

6. Repeat steps 3 thru 5 for the removal of the right side over axle pipe.

7. 140320 ONLY:

(Use Figure 5A if front pipes have hangars): Measure and mark

a line 1” on front pipe in front of hangar.

(Use Figure 5B if front pipes do not have hangars):Measure and

mark a 10” line on front pipe after the catalytic converter.

Using a reciprocating saw or a chain style pipe cutter, cut the pipes as marked. Remove original H-Pipe from assembly. De-bur the

inside and outside of the pipes.

8. Lubricate hangers and rubber isolators. On left (driver) side muffler assembly, remove the hangers from the rubber isolators and re- move the muffler from the vehicle. (See Figure 6)

9. Repeat step 7 for the removal of the right (passenger) side muffler assembly.

Warning: Use extreme caution during installation. Torque all fasteners according to manufacturer’s torque values and tightening sequence.DO NOTuse air impact tools to tighten fasteners on Borla Performance Exhaust Systems. Use of such tools may result in bent flanges or gasket contact areas leading to exhaust leaks.

Borla Performance Cat-BackÔExhaust System Installation

1. Place a clamp over the expanded end of the left (driver) side muffler assembly and set it up into position installing the hangers into the rubber isolators. (See Fig. 7)

2. Repeat step 1 for the installation of the right (passenger) side muffler assembly.

3. Place the original clamp over the expanded end of left (driver) side over axle pipe and set it into position by first installing the rear portion into the muffler assembly.

4. Repeat step 3 for the installation of the right (passenger) side over axle pipe.

5. Check your exhaust system for proper clearance under the vehicle and also for tip alignment. (See Fig. 8)

6. 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.

Note: When you first start your vehicle after the installation of your new Borla Performance Exhaust System, there may be some smoke and fumes coming from the system. This is a protective oil based coating used in the manufacturing of mandrel bent performance exhaust tubing. This is not a problem and will disappear within a very short period of time after the exhaust has reached normal operating temperatures.

Congratulations!!!As shown in figure 8, you have completed the installation of the world famous Borla Performance Stainless Steel Exhaust System.

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