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Description
Aftermarket Assassins 2022-Up Pro R 4 Cylinder Stage 3 (260 HP) Lock & Load KitLock and load your Polaris Pro R 4 cylinder and get ready for some serious kick! The Pro R is an awesome machine, but Polaris left a ton of room for improvement on the table. This simple kit is the best way to wake up your Pro R as it comes with our proven ECU flash. The ECU flash adds some amazing horsepower from low end to high end RPM and really gives your machine that "snap" you're looking for. Our AA Stage 3 clutch kit compliments the tuning
Lock and load your Polaris Pro R 4 cylinder and get ready for some serious kick! The Pro R is an awesome machine, but Polaris left a ton of room for improvement on the table. This simple kit is the best way to wake up your Pro R as it comes with our proven ECU flash. The ECU flash adds some amazing horsepower from low end to high end RPM and really gives your machine that "snap" you're looking for. Our AA Stage 3 clutch kit compliments the tuning perfectly by more efficiently transferring power to the wheels and ridding yourself of the very lazy factory clutching setup and poor belt grip. We finish out the kit with our AA RZR Pro-R full exhaust (head pipe and muffler) and it's just what your machine needs! We set out to produce an exhaust that looks great, sounds great and has adjustable sound levels while producing the most power possible.
Free Shipping to the Lower 48
- Kit includes AA ECU flash for 2022-Up RZR Pro R 4 Cylinder Models **Requires ECU to be sent in for programming** , AA Stage 3 Clutch Kit with primary clutch limiter and butter shift washers, and AA Stainless Full Exhaust (head pipe & muffler).
- Works with all models including ones with Dynamix and/or EVAP models.
- Looking for the best/most badass ECU tuning available for your RZR Pro R? AA's performance tunes are now available to gain horsepower and torque. Through our advanced ECU tuning we are able to modify parameters correctly to gain you the power needed. We are highly experienced in tuning RZRs and this will show.
- The Pro R uses a new Bosch MG1 ECU. Currently no programmers like the PV3 are available and no ETA, so sending your ECU in for a bench flash is the only way to get a great tune.
- Big horsepower gains depending on the level of tune/modifications (see tune descriptions below for more details)
- Much quicker throttle response and power delivery giving a whole new feel to the vehicle
- Throttle by wire limiters disabled
- Fan on/off at 185 degrees Fahrenheit (Stock is 190) which is just above the thermostat opening temp. The progressive fan also ramps up quicker to keep you running cooler than OEM.
- Speed limiter removed in low and high gears (Most will be able to run over 100 MPH!)
- More throttle % in low gear and reverse
- Rev limit at a safe 8800 RPM (stock is 8650). Ideal peak RPM is 8200-8500 with the flash, but 8800 is for ramp up overshoot/top speed.
- AA's wicked timing curve is safe for the fuel used, but we do a much better job of finding timing limits for ramp up/more torque. Many others simply focus on wide open throttle timing/fueling.
- AA's modified fuel curve will still get decent mileage cruising, but is corrected over the factory lean AFR when needed.
- AA muffler is now available with an electronic cutout option to adjust sound on the fly without having to install or remove a quiet cap.
- Included Level 2 Tune: This tune is developed for a Pro R with our aftermarket exhaust on 91-93 octane. It has just a bit more timing and a bit more fuel over our Level 1. This tune adds +22 RWHP peak and a massive +33 RWHP at 38 MPH (This is gaining roughly +40 crank horsepower) putting you at roughly 265 crank horsepower with just a flash and full exhaust! Our included Stage 3 clutch kit with this tune really helps the belt to grip and to help drive the extra power to the wheels.
- If you're unsure if your Pro-R is an EVAP model or not, check your Emissions Control sticker located on the front driver's side frame rail above the master cylinder. See pictures for location.
- More tunes coming soon!
- *** ECU MUST BE SENT IN FOR PROGRAMMING: Aftermarket Assassins, 2348 75th Ave, Osceola, WI 54020 ***
- The ECU is located behind the passenger (rear passenger if 4 seat) seat. Remove the top panel behind the seats, then remove the fabric panel to expose the ECU. Remove the torx bolts and ECU connectors.
- Customer is responsible for shipping to AA, a shipping label is not included in the price
- Programming turnaround will vary, but is normally 1-2 days.
- Express ECU service for US main 48 states only. We'll send you a next day UPS label, and ship your ECU ONLY back via next day. All other pats will be shipped ground unless otherwise specified/selected during order checkout. Keep in mind we cannot guarantee same day programming or control UPS shipping times/delays. We will do everything possible to turn the ECU around as fast as possible.
- When the ECU arrives we'll read your stock file to determine if it's an Evap model or standard, and we'll keep a file folder for your stock/tune files. We'll then flash with the correct AA tune.
- If you ever need to go back to the OEM tune we charge $95 which includes shipping back to you (shipping back for lower 48 US only). Please contact us if you need to go back to your OEM tune.
- MAKE SURE you insure your ECU for $700. AA is not responsible for shipping delays or lost ECUs. While more expensive over Priority Mail or FedEx, UPS has been the most reliable carrier in our experience.
- While express shipping is available on the ECU, express shipping is NOT available for the other items in this kit (the shipping you select in your cart). To safely ship these parts, they must go into 2 separate boxes and shipping will only calculate for one box. If you need the rest of the parts expressed, please message us first. Please note the 5-10 day lead time for production/assembling/kitting of these items.
- Why AA tunes over others? We have been tuning UTV's with CVT clutches for a long time, longer than almost anyone in our field going back to the 800 RZR. Tuning a CVT vehicle properly is not an easy task as you have so many variables at one time. We spend the time to wheel dyno(with actual UTV tires) correctly per modification, and have advanced ECU calibration and clutching knowledge to do so. Every change in horsepower can result in us changing clutching several times. We also develop most of our supporting mods so we know everything works correctly, and build parts to fit the vehicles needs. Lastly and honestly the most important; we then back up our results with real world data logging on local trails and our facility on 110 acres. It's this combination that truly makes the difference and why AA normally has a faster vehicle with the same or less rated tune horsepower. We left nothing on the table on the Pro R bolt-on parts, if others claim more power/gains for the same mods use caution in believing it!
- If you have any other needs in these tunes, or any concerns; please e-mail!
- Stage 3 Clutch Kit includes: AA Recoil magnetic adjustable clutch weights, setup/installation sheet, primary spring, AA secondary helix, secondary spring, butter shift washer/shim for increased spring preload and less spring harmonics
- We highly suggest our Revolver Billet Clutch Cover with Tower Lock to strengthen the clutch and provide more airflow for even better cooling
- The only special tool needed with our clutch kit is our Compression Tool #1
- Follow this link for more information on our Stage 3 Clutch Kit
- Follow this link for more information on our full exhaust system: Stainless Head Pipe & Stainless Slip-On Exhaust
- Follow this link for instructions on how to locate/remove ecu
- Oh... and get ready for your Pro R to flat out rip!
- 113-1017-3
jds 1/27/23
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 213 reviews
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Product Reviews
★★★★★ 5
Best flip-flops I've met
Size: 11, Color: Black/Geyser
Right away I was impressed by the thichness and cushioning of these flip-flops. They are not a flimsy piece of rubber under my foot. The sole is more like that of an athletic shoe with layers and an impressive tread.
I've always found that my heel sits too much on the back edge of flip-flops, or even over it. So I ordered these just a half size large and they're perfect. The foot cradling allows my heel to sit down inside the flip-flop comfortably and securely. They're not about to fall off. The toe piece (I don't know what it's actually called) is not just the typical round rubber post. On these flip-flops it's nicely shaped and fits comfortably between my toes.
The arch support is nice too. They're not just flat.
In spite of being more substantial than the cheapies we all know, these remain lightweight. They clearly look better too
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Reviewed in the United States on April 28, 2026
★★★★★ 5
Well made
Size: 11, Color: Black/Geyser
The first thing that stands out about the Columbia PFG Castback Flip sandals is the solid build and clean fishing-inspired design. The Black/Geyser color combination looks sharp and matches the product photos well. The straps feel durable and comfortable against the foot, and the footbed has a slightly cushioned feel that makes them comfortable right out of the box. Overall construction feels sturdy, which is what you’d expect from something designed for outdoor or water use.
In everyday wear, the sandals are comfortable and easy to walk in. The footbed provides decent grip and support, and the textured surface helps keep your foot from sliding around when they get wet. They work well for casual use, whether it’s around the house, at the beach, or after a day on the water. The lightweight feel also makes them easy to pack for trips or outdoor activities.
After wearing them for a while, they hold up well and remain comfortable for daily use. The materials seem durable and the straps stay secure without stretching out. They’re simple, reliable sandals that work well for warm weather, boating, or casual summer wear. Overall, they’re a solid choice for anyone looking for comfortable flip flops with a slightly more rugged outdoor style.
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Reviewed in the United States on March 10, 2026
★★★★★ 5
Extremely comfortable with slight roomy fit
Size: 11, Color: Black/Geyser, Size: 11, Color: Black/Geyser
These are easily the most comfortable flip flops I have ever owned. From the moment I put them on, there was no break in period at all. They felt soft, supportive, and ready for all day wear right out of the box.
The cushioning is excellent without feeling too soft, and they have a nice stable feel when walking. They are lightweight and clearly made with quality materials, making them great for everyday use or around water.
One thing to note is that they run a little on the larger side, so if you are between sizes, you may want to consider sizing down for a better fit.
Overall, these are a great combination of comfort, durability, and function. I would absolutely recommend them, especially if comfort is your top priority. (Excuse the teeth marks- my dog unfortunately got ahold of them before I snapped the photo- they are PERFECT out of the box)
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Reviewed in the United States on March 22, 2026
★★★★★ 5
Comfortable Flip-Flops with a Clean, Sporty Look
Size: 13, Color: Black/Geyser
I picked up the Columbia Men’s PFG Castback Flip in the black and white colorway, and the first thing I noticed was how comfortable they felt right out of the box.
How They’ve Been Used:
Even though it’s still winter, I’ve been wearing them around the house occasionally to get a feel for the fit and comfort. I plan to use them more regularly outdoors once the weather warms up.
What Worked Well:
Immediate Comfort: The footbed feels cushioned and supportive without needing a break-in period.
Secure Fit: The straps sit comfortably without rubbing or feeling stiff.
Lightweight Design: Easy to slip on and off for quick wear.
Clean Style: The black and white combination gives them a sharp, versatile look.
Positive Feedback: My wife has already commented on how good they look.
Things to Keep in Mind:
Seasonal Use: Best suited for warmer weather and casual settings.
Sizing: Checking the size guide helps ensure the right fit.
Bottom Line:
Based on my experience so far, these flip-flops offer a great balance of comfort and style. They’re comfortable enough for everyday wear and look sharp enough for casual outings. I’m looking forward to putting them to full use once spring arrives.
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Reviewed in the United States on February 27, 2026
★★★★★ 5
Columbia always makes great stuff
Size: 14, Color: Espresso II/Black
Even with my flat feet these offer a lot of padding which makes these extremely comfortable. They increase my height about an inch haha. These are great for walking around the beach or just going for walks. The tread on the bottom of these make walking up hills where the surfaces are not completely even extremely easy and very grippy. Time will tell how durable these are, but so far they're holding up very well.
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Reviewed in the United States on March 15, 2026