How to Install Borla Touring Cat-Back Exhaust - Dual Rear Exit on your Sierra

Installation Time

2 hours

Tools Required

3/8” Drive Ratchet
3/8” Drive Extension 3”
15mm Socket
Pry Bar

View PDF Guide

Shop Parts in this Guide

SHOP SUPPLIES:
1 Spray Lubricant

Borla Performance Cat-back™ Bill of Materials

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 clamp located just after the catalytic converter. (See Fig. 1)

2. Place hardware to the side for use during the installation of your new
exhaust system.

3. Lubricate all hangers and rubber isolators.

4. Remove the hangers from the rubber isolators and remove the exhaust.
(See Fig. 2)

5. Using a muffler stand or an additional person to hold the exhaust and remove from vehicle. (See Fig. 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. Using the original hardware, place the Front Pipe Assembly into position
using the factory ball clamp. Install the hanger into the rubber isolator.
(See Fig. 4) Do not tighten the clamp.

2. Place a clamp on the inlet of the Muffler Assembly and insert into the
Front Pipe Assembly and insert hangar into rubber isolators. Use a muffler stand or an assistant to hold into position. (See Fig. 5) Do not tighten the clamp.

3. Place clamp over the expanded end of Over Axle Pipe inlet. Insert into Muffler Assembly outlet. Do not tighten the clamp.

4. Place clamp over the expanded end of the R/H Tail Pipe Assembly. Insert into Muffler Assembly outlet and insert hanger into rubber isolator. (See Fig. 6)

5. Install Bracket Hanger Assembly to left-side using provided hardware. (See Fig. 7) Do not tighten the clamp.

6. Install the supplied Heat Shield Reflex Wrap to the brake line over axle. (See Fig. 8)

7. Check your exhaust system for proper clearance under the vehicle and also for tip alignment. Tighten clamp nut 35 ft. lbs.

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

9. Start vehicle and check for any leaks. If any leaks are found, determine cause such as loose or incorrectly positioned clamp and repair as neces-sary.