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How to Install Borla Stinger S-Type Cat-Back Exhaust - Dual Side Exit on your F-150

Installation Time

2 hours

Tools Required
  • 3/8” Drive Ratchet
  • 3/8” Drive Extension 3”
  • 15mm Deep Well Socket
  • Pry Bar
American Muscle
Shop Parts in this Guide



Caution!!! Never work on a hot exhaust system. Serious injury in the form of burns can result If the vehicle has been in use and the exhaust system is hot, allow vehicle to cool for at least 1 hour. 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 Exhaust 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 neces-sary for the installation of your new Borla Performance Exhaust System.

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 lubri-cate the threads before attempting to disassemble.

Original Exhaust System Removal

1. Unbolt the clamp located in front of the muffler assembly. (See Fig.1)


2. Lubricate all hangers and rubber isolators.

3. Use a muffler stand or an additional person to support the ex-haust system. Remove the hangers from the rubber isolators and remove the exhaust system from the vehicle. (See Figs. 2 & 3)

WARNING: Use extreme caution during installation. Torque all fasteners according to manufactur-er’s torque values and tightening sequence. DO NOT use 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.

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.




Borla Performance Cat-Back Exhaust System Installation

1. Follow instructions for these part numbers:   140346 ONLY: Install Front Pipe Assembly using factory clamp. Carefully  insert hanger to the rubber isolator. (See Fig. 4)  140404 ONLY: Install Front Muffler Assembly to flange using factory  hardware. Carefully insert hanger to the rubber isolator. Place a clamp over the expanded end of the Extension Pipe and insert over the outlet of the Front Muffler Assembly. 


2. Place a clamp over the inlet of the Muffler Assembly and install over the (above installed component or factory pipe) outlet. Do not tighten the clamp.

3. Place a clamp over both expanded inlets of the Tail Pipe Assembly and install over the outlet of the installed Muffler Assembly. (See Fig. 5) Do not tighten the clamp.


4. 140404 ONLY: Place a clamp over the expanded end of the Tip/Nipple Assembly and install over the outlet of the . (See Fig. 7) Do not tighten the clamp.

5. Check your exhaust system for proper clearance under the vehicle and also for tip alignment.

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.

WARNING: Use extreme caution during installation. Torque all fasteners according to manufactur-er’s torque values and tightening sequence. DO NOT use 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.

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.