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How to Install Borla Stinger S-Type Axle-back Exhaust (15-17 EcoBoost Fastback) on your Ford Mustang

Installation Time

1 hours

Tools Required
  • 3/8” Drive Ratchet
  • 3/8” Drive Extension 3”
  • 15mm Socket
  • Metal cutting saw
  • Pry Bar
  • Spray Lubricant
American Muscle
Shop Parts in this Guide

Borla Performance Rear Section - Bill of Materials



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. The factory under-axle pipe must be cut and rear mufflers removed.


2. Starting on right-side under-axle pipe, measure and mark a
perpendicular cut-line (indicated in green) 2” from pipebend (indicated in white). Use a metal cutting bladed saw, carefully cut this right-side pipe at the cut-line. (See Fig. 1)


3. Remove hangars from rubber isolators and carefully remove
the right-side muffler from the vehicle. (See Figs. 2 & 3)


4. Repeat Step 1 to mark left-side cut-line and cut the left-side
pipe.


5. Clean the under-axle pipes and de-burr the edges using a file
or rotary grinder.


Warning: Use extreme caution during installation. Torque all fasteners according to manufacturer’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.


Borla Performance ExhaustSystem Installation

1. Beginning with the L/H Muffler Assembly, place a clamp over the inlet tube and insert (2) hangars into the rubber isolators. Insert the L/H Muffler Assembly inlet tube over the (cut) under-axle pipe. (See Fig. 5 & 6) DO NOT TIGHTEN CLAMP.


2. Repeat Step 1 for the installation of the R/H Muffler Assembly.


3. Check your exhaust system for proper clearance under the
vehicle and also for tip position to the valence opening. (See
Fig. 7)


4. Once position has been determined to be correct, tighten the
Accuseal™ clamps to 32-35 ft. lbs. (See Fig. 8)


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


6. 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!!! You have completed the installation of the world famous Borla Performance Stainless Steel Exhaust System.

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