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Description
Aftermarket Assassins 2022-Up Pro-R 4 Cylinder Stage 4 (275 HP) Lock & Load Kit **2-5 Day Lead Time**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
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.
- Kit includes AA stage 3 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, AA Stainless Full Exhaust (head pipe & muffler), and Brian Crower High Performance Stage 2 Cams.
- BC "Drop In" camshafts work extremely well, but especially well above 8400 RPM. This comes into play for all types of riding, but especially those riding faster pace and/or dunes riding. Running at 8500-8700 RPM works well in these situations.
- Cams are drop in, but valve clearance still should be checked and adjusted with new buckets as needed.
- 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 (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 8500-8600 with the flash and cams, 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 3 Tune: This tune is developed for a Pro R with our aftermarket exhaust and Brian Crower High Performance Stage 2 Cams on 91-93 octane. This tune adds +29 RWHP peak and a massive +33 RWHP at 45 MPH (This is gaining roughly +40 crank horsepower) putting you at roughly 265 crank horsepower! 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.
- *** 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!
- We offer two clutch kits:
-
Standard Load: The Standard Load clutch kit is meant for stock or near stock size tires and is the one for most fast pace riders or racers. If crawling with a 2 seat model on 34-35" tires we recommend the High Load setup. You'll sacrifice some acceleration but have much better low end belt grip for less belt slip.
- 2 Seat Models: 32-35" dirt tires or 30-32" paddles
- 4 Seat Models: 32-33" dirt tires or 28-30" paddles
-
High Load: The High Load clutch kit is meant for those with larger tires or riding style is mostly low speed crawling
- 2 Seat Models: 36"+ dirt tires or 33"+ paddles
- 4 Seat Models: 34"+ dirt tires or 32"+ paddles
- 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!
DM/3-15-23
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
4.3 ★★★★★
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Product Reviews
★★★★★ 4
Great product for dry, sensitive under eyes, however does not really reduce wrinkles
Great moisturizer. While it’s marketed as reversing wrinkles that has not been my experience however I have very thin skin underneath my eyes that is often dry and very dark from allergies. I put this on every day and every night and I have noticed a huge difference in the way, my eyes look. I wouldn’t say it reduces wrinkles, but it definitely is really a great hydrator, especially if you have allergies. It’s very good for sensitive skin. I do use it all over my face, especially around my mouth area as well and again haven’t noticed that it really reduces my wrinkles, but it definitely helps. Hydrate all those sensitive problem areas. I liked it so much. I bought it twice.
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Reviewed in the United States on May 29, 2026
★★★★★ 3
Doesn't give instant results like those videos you see but still works good
Ive been seeing so many videos with different people saying how this stuff works instantly on their lines and bags under their eyes. I thought when I got it it was going to be oily because in those videos it literally looks like they have oil on their face. HOWEVER, this is more like a chapstick texture. I tried to use it on my eye bags as soon as I got it but I swear it almost made them look worse. Those videos showing them getting results instantly just aren't true. I've only been using it for a few days and I do see the lines on my forehead & between my eyes are definitely less noticeable so it is doing something so far! My bags however it's just done nothing noticeable for YET. That will probably take a couple weeks to show results. So long story short, if you're thinking about buying this thinking you're going to get the results from those videos going around you'll be disappointed but it does still give results. I will probably update after a couple weeks or however long it takes for my bags under my eyes to go away or to at least see results. My lines on my face aren't very prominent but my bags under my eyes are so we'll see.
Also this product isn't greasy I have an oily T zone and this doesn't make my face oily at all. If you don't like how it feels when you rub the stick on your face then use your hands and rub the product in to the skin and it will completely absorb the product.
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Reviewed in the United States on January 1, 2026
★★★★★ 5
One of the Most Useful Skincare Products I Own
Title: One of the Most Useful Products for Mature Skin — Smooths, Protects, and Works Beautifully Under Makeup
At 52 with post-menopausal dry, mature skin, I’m always looking for products that don’t just sit on the surface, but actually improve how my skin looks and behaves throughout the day. This surprised me in the best way.
This is not a treatment product, and it’s important to set that expectation upfront. This is a barrier-supporting, smoothing balm, and when you use it for what it is, it performs exceptionally well.
The texture is where it really wins. It’s a solid balm stick, but it glides effortlessly without dragging or pulling on the skin, which is critical for more delicate, mature areas. It melts just enough on contact and leaves behind a smooth, lightweight, conditioned finish that feels nourishing without being greasy or heavy.
From a formulation standpoint, this is built around silicones and emollients that give an immediate soft-focus effect, combined with oils and butters that help reinforce the moisture barrier. There’s also adenosine for long-term wrinkle support and collagen extract for conditioning, though this is not going to rebuild collagen or act like a corrective serum.
What it does do extremely well is improve the appearance of the skin instantly. It softens fine lines, reduces that dry, crepey look that can show up midday, and adds just enough slip and hydration to make the skin look healthier and more refined.
Where I really love this is under makeup.
It creates a smooth, hydrated base that helps foundation sit better and prevents it from catching on dry areas. It doesn’t pill, it doesn’t break anything down, and it adds that subtle cushion that mature skin really benefits from. I’ve also used it over makeup for touch-ups, and it works just as well without disturbing what’s underneath.
This has quickly become one of those products I keep within reach because it’s so practical. It’s not about transformation — it’s about maintenance, comfort, and immediate visual improvement, which, for mature skin, is often exactly what you need.
No irritation for me, and it layers seamlessly with the rest of my routine.
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Reviewed in the United States on May 5, 2026
★★★★★ 5
Consistency is the key
This product is amazing. You have to keep in mind that it doesn’t give instant results. However, consistent use will reveal wonders. I use my whole stick before I started to see results. When my stick was gone, is when I looked in the mirror and I was shocked. My forehead was tighter and lifted. My under eye bags had disappeared, and my eyes looked tighter. My skin was just so youthful looking. So I was like OK!! I need to order another one, I swear I didn’t think it was working at all until the sticker was gone. And I just woke up one morning and noticed a huge difference. I wonder if the changes will last?
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Reviewed in the United States on May 25, 2026
★★★★★ 4
The balm stick needs to roll all the way to the top
Overall I like the product itself I think its very moisturizing and it does seem to help the appearance of wrinkles however I think for the cost its pretty wasteful in the application. The rollup stops and there is still a ton of product on the bottle. I had to dig it out with my finger for a good 2 weeks worth of product I dont understand why it doesnt roll all the way to the top..
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Reviewed in the United States on June 1, 2026