97735 Monster Exhaust for 2011-2016 GM 2500/3500 6.6L Duramax

Part #s 48998, 48998-B

Banks Monster Exhaust® 5-inch System 2011-2016 Chevy/GMC 2500/3500 6.6L Duramax LML Single Rear-Wheel

Please read through the following instructions thoroughly before starting your installation. If you have any questions please visit our Support Page.

Bill of Materials

Monster Exhaust System Installation

1. Disconnect the battery(s).

As a precaution, disconnect the ground of the battery (if there is more than one battery, disconnect both.)

Tuck the cable out of the way to prevent contact with the battery.

Diagram showing where common jack points are.

2. Raise the vehicle and support it with properly weight rated safety stands, ramps or a commercial hoist.

Follow the manufacturer’s safety precautions and take care to balance the vehicle to prevent it from slipping or falling.

When using ramps, be sure the front wheels are centered squarely on the ramps; place the transmission in park; set the parking brake, and place blocks behind the rear wheels.


WARNING! The following step will require the use of a saw. Proper safety equipment should be used. Failure to use proper safety equipment may result in severe injury.

NOTE: Lubricating the rubber hangers with WD-40 or similar lubricant will ease the removal of the hanger pins.

3. Measure from the rear weld of the DPF toward the rear of the truck.

Take time when measuring and cutting the factory pipe to ensure the proper location and a straight cut. An improper cut will result in poor fitment.

4. Cut the factory exhaust pipe 8-27.5″ depending on truck configuration from end of the DPF.

5. Remove the factory tailpipe from the vehicle.

Disengage the exhaust system hanger pins from the rubber hangers using a large screwdriver, pry bar or hanger removal tool sold in any auto parts store.

6. Clean off any burrs left over from your cut.

1 inch wide clamp placement

7. Slide a 4” exhaust clamp onto the front of the Banks Monster Exhaust front tailpipe.

Fully engage the clamp so none of the notch is showing.

8. Install the front tailpipe onto the cut factory pipe.

Loosely snug the 4” clamp, You’ll need to adjust the angle for final fitment.

9. Fully engage the exhaust hangers.

The exhaust hangers should be parallel to the ground and the rubber bushings straight and centered.

10. Install a 5” exhaust clamp onto the inlet of the Rear Tailpipe & Install the Rear Tailpipe onto the outlet of the Front Tailpipe.

11. Insert the Rear Tailpipe hanger pin into the factory rubber hanger.

Rotate the tailpipe until the hanger pin is parallel with the frame mounted pin. Loosely snug the 5” clamp.

Fully engage the exhaust so the hangers look as shown.

12. Engage the factory rubber hangers onto the hanger clamp pins. 

Fully seat the Monster Exhaust towards the nose of the truck. The Rubber hangers should now be reclined slightly back, similar to how your seatbacks are.

When hot, the exhaust can grow by over an inch in length, this allows for exhaust pipe expansion.

13. Install the SideKick tip with clamp.

The tip has an internal stop to prevent it from sliding on too far. Tighten just snug so you can fine tune the tip alignment.

Make sure the drain hole is facing down, and the banks logo, facing up.

SideKick tip should be slightly angled down for condensation to drain.

The tip should angle slightly down for condensation to drain out.

Align the tip so there is a 1inch gap around the body work.

Orient the top so there is a 1″ air gap around the bodywork. Make sure the tip is slightly raked back towards the rear bumper to allow for exhaust gas siphoning.

Adjust the over axle portions until fitment is correct.

14. Tip Adjustments:

Rotate the front and rear tail pipes until you are satisfied with the final fitment, and tighten each exhaust clamp to 50ft-lbs starting from the DPF going backwards.

fully seated exhaust should have the hangers slightly reclined as shown in the diagram.

15. Adjust each of the pipes to ensure that all of the hanger pins are parallel with the frame-mounted pins.

Check that the rubber hangers are all positioned slightly forward, leaning at a similar angle as your seatback.

This allows the hangers to be properly positioned once the exhaust system reaches operating temperature.

Final check that the tip looks good and in properly positioned.


The minimum distance between exhaust tip and body is one (1) inch.

CAUTION: The protective covering may ignite and burn if not removed prior to running the engine.

Reconnect the batteries of the vehicle.

16. Re-connect the negative battery cable(s).

Start the engine and listen for exhaust leaks. Tighten the exhaust clamps as necessary. Whenever possible, tack weld slip connections to prevent disengagement is recommended. The Banks Monster Exhaust installation is now complete.