Aftermarket Assassins

Aftermarket Assassins Aftermarket Assassins is a UTV performance facility located in Western Wisconsin. We are dedicated t Thanks for checking out our page!
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Aftermarket Assassins in a UTV performance center that provides custom tunes, clutching, exhaust, and other modifications. Feel free to send us a message with any questions you may have.

What a busy few months!  We greatly appreciate everyone and hope many can get out to enjoy a ride for Memorial Day.We ha...
05/20/2026

What a busy few months! We greatly appreciate everyone and hope many can get out to enjoy a ride for Memorial Day.

We have a ton of things we should post with updates, but we'll save that for when it slows down. CF Moto Z10 testing is going extremely well, we should share final dyno numbers next week.

If you have our Ridge ECU tuning(via PV3 tuner), we now have the ability to desensitize the CVT light. All of our current tunes in the last month or so have had this included. While belt slips issues are real and should be addressed (see our tech articles), the CVT light is extremely sensitive on these models and puts you into a momentary limp mode. We lightly push this parameter out to stay safe with your CVT. For those that already have our tune, you can see how to update here: https://aftermarketassassins.com/products/ols/products/kawasaki-ridge-1000-aa-custom-tune-update-for-pv3-and-pv4

Thanks! -Mike

**This tune update is for customers that already have the Powervision and an AA custom tune for the Kawasaki Ridge 1000** ***This update charge covers all tunes built for each specific PV3/ECU. If you have multiple machines/ECUs/PV3s each one will need the update purchased** **New feature unlocked a...

CF Moto Z10 engine calibrations are working extremely well!  We have picked up 650rpm  so far. We’ve also greatly increa...
05/12/2026

CF Moto Z10 engine calibrations are working extremely well! We have picked up 650rpm so far. We’ve also greatly increased the slow pedal/turbo response these come factory with.

Going to strap it on the dyno and should have power numbers with clutching in the coming week or so. 👍🏼 -Mike

Our CF Moto Z10 has arrived! Time to get to work as we know this platform will have big potential. Cant wait to see wher...
05/08/2026

Our CF Moto Z10 has arrived! Time to get to work as we know this platform will have big potential. Cant wait to see where we end up.

04/28/2026

Backcountry Crew with the view of the H2 ripping the dune trails! Our trip was more testing oriented, so not much video. I wish we had some of the shots showing how hard we were sending this green beast!

04/28/2026

Dunes testing! We set out to Oklahoma last weekend for some H2 testing on the 310hp Kit, Maverick R E85 tune(it’s a beast!), and putting more time on the Pro R with our AA Turbo.

The H2 with this kit is impressive for being a 4 seat. We ran with our Revolver billet cover at 9500rpm with no issues on the OEM clutch. No belts blown with our clutching. Just a smooth ride, great power, and excellent ergonomics. All 3 big dog SxS’s are impressive in their own way. It’s all about what you like, and we can help make them all even more fun!

9 Years of AA!   Today marks 9 years since our very first item sold. What an absolute crazy ride this has been. We’ve be...
04/14/2026

9 Years of AA! Today marks 9 years since our very first item sold. What an absolute crazy ride this has been.

We’ve been quiet on social media as we have our heads down grinding away. We are busier than ever!

I never expected anything near this 9 years ago when I started in my basement/garage (and Ray welding exhaust in his garage)

I have to give a HUGE thanks to our amazing customers/friends. Most of our business has been word of mouth for years now.

Another HUGE thank you to our employees. AA is a family operation and most of us working together have known each other 20+ years. These guys and gals bust their butts to make things happen on the daily. 🙌🫡

Can’t wait to celebrate a decade next year and many more! -Mike

Honda is stepping into the cab UTV game with the 2026 (late release) Pioneer Elite HVAC model.   This thing has cruise c...
03/25/2026

Honda is stepping into the cab UTV game with the 2026 (late release) Pioneer Elite HVAC model. This thing has cruise control which is an industry first! Dual clutch transmission means no belt. This should be a great option to add to the mix. Can't wait to get our hands on one later this year. -Mike

Check out this Dual Suppressor muffler overview on the 2024+ RZR XP 1000.   These dual muffler exhausts are a game chang...
03/23/2026

Check out this Dual Suppressor muffler overview on the 2024+ RZR XP 1000. These dual muffler exhausts are a game changer for low sound with a nice deep tone. However, they actually make MORE power than a single muffler(on NA models) due to the added volume, but free flowing designs. We offer them for many models like the Xpedition, Ranger XP 1000, General, Pro XP, and more!

In this video, I install and review the Aftermarket Assassins Dual Muffler Exhaust on my 2024+ Polaris RZR XP 1000 and compare it directly to the stock exhau...

The Iceman SxS Race was a great time! AA Red Dragon(Maverick R) piloted by Jason Sabatier and I(Mike)✅I was able to come...
02/24/2026

The Iceman SxS Race was a great time!

AA Red Dragon(Maverick R) piloted by Jason Sabatier and I(Mike)
✅I was able to come up with the fastest lap late in the race 💪🏼the red dragon was flying.
✅2nd place in Pro Open
Excuses: We had to limp back on gas due to a gauge issue twice(we each learned a lesson), and sabby accidentally hit low range instead of park in the pits which resulted in 1/4 lap in low range. We still had a ton of fun and ran a great race

Brad Minerick piloting Barry (Maverick R) took the 3rd Pro Open spot. He was driving extremely well until his tr**ny didn’t play nice. It stuck in gear many times and would not shift without resetting power on the side of the track. A frustrating issue to come up on race day.

Adam Koosmann and Thomas Serafin came up with 3rd in pro stock. This class is dominated by YXZ’s, but the 2024 RZR1K was able to reach the podium. No issues, good fuel economy, and solid driving. Best part is, they did not know they were racing until 11pm the night before the race… we proceeded to race prep this vehicle until 1:30 in the morning before the race. Oh, and Thomas had never driven a SxS on the ice! Minor details.

Being a local race for us, we have a massive crew of people come out to help. Such a great weekend with family and friends. Thank you all so much!

Also a huge thanks to the Iceman owners and crew for sticking it out and making it happen. Great work.

We’ll have some awesome drone and in vehicle videos coming out soon.

02/05/2026

Polaris drops new Ranger Cab models. The Ranger XP1000 (dual cam, 82hp) available in an 3 or 6 seat. This is basically a dulled down Northstar model aiming for price point. Also released is the Ranger single cam 61hp model with heat only.

Nothing crazy here, but it makes sense to go after the cab market as they are so popular. Though it comes with low features, you can still get comfort for a decent value. Adding heat to these vehicles can be a pain. Adding AC is not something that is easily added on.... so for a bit over $24K starting, it seems the 82hp model is a decent deal. -Mike

Address

2348 75th Avenue
Osceola, WI
54020

Opening Hours

Monday 8am - 4pm
Tuesday 8am - 4pm
Wednesday 8am - 4pm
Thursday 8am - 4pm
Friday 8am - 3pm

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