Polaris RZR NA Dual APXUpdated 3 months ago
Please read the below Important Information relating to Safety & Fuel Tuning by clicking on the text below.
Important Information - Safety
WARNING: Before starting the installation of any ATV, UTV, or SXS aftermarket parts, it is important to prioritize safety. Make sure you are using suitable protective gear, this includes but is not limited to safety goggles, gloves and protective clothing.
Ensure your vehicle is on flat, stable ground. Installing parts on uneven or unstable surfaces can potentially lead to injury or damage to the vehicle. The vehicle should be turned off and cooled down before proceeding with the installation. Attempting to install parts on a running or hot vehicle can result in burns or other serious injuries.
After completing installation, it is important to inspect and check the tightness of any and all nuts, screws, and bolts. Failure to properly secure these fasteners can lead to component failure or detachment during riding, posing significant safety risks to both the rider and bystanders. The vehicle should be warmed up and subsequently cooled down to account for any thermal expansion or contraction effects that may affect the tightness of the fasteners.
It is crucial to inspect and tighten screws and bolts as necessary after initial rides, as vibrations and stresses during operation can cause fasteners to loosen over time.
It is important to pay close attention to the condition of the exhaust system and undertake the necessary measures to maintain optimal performance. Failure to properly maintain the exhaust system can result in reduced engine performance and potential safety hazards. Remember to repack exhausts as necessary to ensure efficient exhaust flow and minimize any potential restrictions that could adversely affect performance.
Prior to starting the installation process, it is important to thoroughly read all provided instructions to familiarize yourself with the installation procedures and any specific requirements or precautions. Failure to follow the instructions could result in improper installation or component failure.
Please check your local laws and regulations governing the use of aftermarket parts on your vehicle. Failure to comply with these regulations can result in legal repercussions, fines, or other penalties. Therefore, it is important to research and understand the applicable laws and regulations before installing aftermarket parts on your vehicle. Always ensure that any modifications made to your vehicle comply with local regulations.
Please check and read the full Warranty Information that can be found at:
Important Information - Fuel Tuning
The use of an aftermarket performance exhaust requires a crucial step - EFI tuning. RJWC Powersports exhaust systems must be accompanied by a proper re-flashing or use of an EFI Tuner to prevent the engine from running lean, which can result in engine damage. To guarantee a correct air to fuel mixture, make sure to adhere to the manufacturer’s recommended settings for your fuel tuner.
Neglecting to properly tune the engine using an EFI tuner when using an RJWC Powersports exhaust will void the exhaust warranty. Any problems arising from the engine not running correctly, such as a lean condition or incorrect air/fuel ratio, will not be considered a valid warranty claim.
Please note that if your vehicle differs from the base model, additional modifications such as a different tune, turndown pipe, or other adjustments may be necessary to achieve a proper fit and optimal performance. All RJWC Powersports exhausts are designed and tested on stock-equipped vehicles.
Spark Arrestor & Shim Ring Installation
The Spark Arrestor and Shim Ring are not pre-installed, they can be found in the Hardware Kit.
To install the Spark Arrestor, start by removing the End Tip. Unscrew the four M6x20 Cylinder Screws in the End Tip to remove it.
There is a small circular groove in the End Cap, in this groove you need to place the Shim Ring first, then the Spark Arrestor.
With the Shim Ring and Spark Arrestor in place, reinstall the End Tip by screwing back in the M6x20 Cylinder Screws.
Removing the Stock Exhaust
Remove the plastic cover and brackets covering the factory muffler. Then remove the factory muffler and heatshield behind the muffler be careful with the stock gasket and springs as it is being re-used.
Remove the factory rubber frame bushings, these are loose in the frame.
Installing the APX Exhaust
Install the APX mufflers on the black plate, make sure this is being done according to the pictures, see below and use the M8x20 Cylinder Screws included with the hardware and the 8.4 Aluminum Washers.
Turn the square tabs until they line up with the square holes in the aluminum plate then screw in the bolts with the washers see pictures below.
Install the stainless inlet pipe on the lower muffler and the G2 Gasket with the 10x Hex Flange Screw. Don’t forget to use the gaskets. See picture below.
Install the aluminum hanger tabs in the frame as the picture shows below and use a 19 mm wrench to hold the hexagon head when you tighten down the bolt.
At the same time make sure that the inlet pipe lines up with the stock header pipe flange. Use the existing holes in the frame as the picture below shows (remove stock bushings) and use the supplied aluminum spacers.
Re-use the stock gasket between the header and inlet pipe. You re-use the stock exhaust spring, but you must use the supplied M8X70 Bolts with an aluminum spacer and nut with flange. See the picture below on how to install them.
With the exhaust mounted you need to tighten all screws in place. You should start your vehicle, allow the exhaust to get warm and shut the machine down to cool. When it is cool, double check all screws and bolts and retighten them.
After your first ride, double check all screws and bolts and retighten.
You have now completed the installation of the Polaris RZR NA Dual APX.
If you have any questions, or need any help please send an email to [email protected]