Aftermarket Assassins '21+ Polaris RZR Pro XP/Turbo R/ Pro S Stage 4 Lock & Load Kit

Aftermarket Assassins '21+ Polaris RZR Pro XP/Turbo R/ Pro S Stage 4 Lock & Load Kit

 

Ready to step up to the next level on your Pro XP/Turbo R and gain some serious power? Up to 320-330 crank horsepower if you build your motor and run race gas or ethanol! However, this turbo will still trail ride on Level 2 (our lowest big turbo tune level) all day long, all while putting less stress on the turbo and motor. This is NOT just a simple billet wheel turbo mod, this turbo has a larger than stock compressor wheel/housing - this gains turbo efficiency to push more air per RPM of the turbo. Boost temps will skyrocket quickly on the factory turbo, whereas with our big turbo they will be much lower, even at boost pressures over 25 PSI! Now that we are moving air on the intake side, we need to get that air out. Our big turbo includes a larger exhaust housing with a high flow exhaust turbine to create less back pressure and heat buildup in the motor. Heat buildup on the exhaust side is another HUGE issue with the factory turbo. What's essentially happening is you are running out of exhaust flow, and that makes more power very hard to produce reliably and consistently. With this high flow turbine, we can increase boost and see a healthy increase in horsepower on higher level tunes with lower EGT. The factory wastegate is also a big problem as it's very weak, and as time passes the spring only continues to weaken eventually leading to boost issues. Building boost with a wimpy wastegate can produce inconsistent results, hot temps, and turbo overheating. We install a high pressure billet wastegate actuator complete with a new stainless steel bracket. This wastegate has extremely consistent results, will hold a huge amount of boost, and is a key component in this turbo upgrade working so well. Each turbo is fully blueprinted and balanced with new bearings from a professional turbocharger manufacturer. 

Thinking of another turbo or turbo mod? Many of our competitors offer an inferior turbo and do not offer the advanced tuning we do. Many use the weak stock wastegate, do not bore the compressor housing, or do not modify/enlarge the exhaust turbine. These are all huge reasons why our big turbo works so well. Tuning changes are drastic for modifications like this, and many others do not have the correct tuning knowledge to pair with such a mod. Lock & Load! This Stage 4 kit provides a big increase in horsepower and torque simplified into an easy package. This Stage 4 kit is the most complete turbo upgrade kit you'll find for your RZR Pro XP/Turbo R/Pro S and backed with the best tuning out there to make your RZR rip all day long. This kit packs a huge punch for the ultimate power gains to the wheels on all fuels. We change boost, timing and hundreds of parameters to deliver safe, yet big horsepower gains. The exhaust greatly reduces back pressure so we can run more boost and that boost delivers more power. The clutching then transfers that power and turns it into wheel power instead of simply just turning it into RPM. Since the stock BOV is weak, we include our high quality billet one in this kit as well. The charge tube is also known to blow out on Level 3 or higher, so our high flow one is included. Lastly, our high flow post-airbox intake tube is included and available in 2 versions. First is the standard version (great for Level 2-3), then we have the catch can version (suggested for Level 4-6).

1 Tune (along with your stock tune) is included in the initial price. Additional big turbo tunes are $95 each at time of initial purchase (Big turbo tunes are $195 each if purchased later on). We highly recommend 2 tunes so if poor fuel quality is an issue you can switch to a lower HP level.
For reference; a Stock machine will dyno at 156-158 rear wheel horsepower (RWHP), 181 crank HP per factory. On our dyno we saw 261 RWHP @ 28-29 PSI on 110 octane, and 267 RWHP on E85 with some serious top end pull. That's a calculated 320-330 crank horsepower, +110 RWHP or +140-150 crank HP gain over factory!
All tunes were developed by one of the most experienced RZR turbo tuners and tuned to maximum power for each specific fuel grade. Our dyno normally reads a bit low compared to some, so keep that in mind.... our setups will normally outrun the competition with the same HP level. This is due to the fact that we make nearly all components/clutching work together to properly transfer and make power. - Mike
Tune levels 2-4 are developed on stock injectors. Levels 4, 5 or 6 requires a catch can and head bolts torqued to 85 ft-lbs or custom AGE 625+ head studs. Levels 5 & 6 require our 1200cc Injectors (All other tune levels will be built for 1200cc Injectors when selecting Level 5 or 6)
running over 25 psi (level 5 or 6) requires a billet crank. You can test the waters with the OEM crank, but most likely you will have issues. Most would pair this turbo with a built motor with the following: Brian Crower Billet Crankshaft, Carillo Rods, CP Pistons, and custom ARP AGE head studs. A fire ring cylinder or K&T big bore cylinder are great options as well. Cylinder head porting, oversize exhaust valves and BC custom ground camshafts are also good modifications to add slightly more power. Level 5 & 6 RACE tunes require custom AGE 625+ studs torqued to 95ft-lbs. Race tunes are mostly for drag racing and should be run at your own risk for extended periods of time. They would be at high risk of breaking the OEM crankshaft.
Level 2 (215-220 Crank HP):  Built for 91 octane, +15-20 RWHP over a bone stock Pro XP. Gains similar to our OEM turbo Level 2 tune, with around 5 more RWHP from the increased turbo exhaust flow. No huge gains over OEM turbo, this tune is simply setup for the larger turbo. Great drivability and good fuel economy for trail riding. You will see cooler intake temps with the AA big turbo vs the OEM turbo.
Level 3 (230 Crank HP): Built for 91-93 octane. This tune produces around 7-9rwhp more than our OEM turbo level 3 tune due to the higher exhaust flow. It's an 18-19.5 psi tune and produces 182-185rwhp or 230 crank hp. You will see cooler intake temps with the AA big turbo vs the OEM turbo.
Level 3.5 (240 Crank HP):  Built for 93 octane, this tune is for those wanting the absolute most out of what is achievable on pump gas. It's a 19.5-20 PSI tune and produces 192-195 RWHP or 240 crank HP. You will see cooler intake temps with the AA big turbo vs the OEM turbo.
Level 4 (270-280 Crank HP): Built for 98-100 octane fuel, and will run fine on octane higher than 100 as well. This will produce 220-225 RWHP (calculated 270-280 crank hp) at 23-24 PSI and hauls the mail! Most will mix race fuel with pump fuel to get the 100 octane which is what we recommend. A can of VP Octanium or Boosting to your tank will also work with this tune. This gains you roughly 20rwhp over the OEM turbo level 4. This tune is pushing it on the OEM crank, but in most cases will run on an OEM motor with the head bolts tightened to 85ft-lbs, or head studs installed. It will be safer to run on a built motor.
Level 5 (290-300 crank HP): Built for 110 octane fuel and simply drops the hammer! You'll have everyone wondering what is done to your RZR with this bad ass tune. The standard tune is 26-27psi for all day running around 245rwhp (290-300 crank), BUT we have the RACE tune which pushes a huge 28-29 PSI of boost that comes on HARD. This RACE tune produces 261+ RWHP (calculated 310-320 crank horsepower) on our dyno. We normally run this tune on 110 leaded fuel. Leaded fuel is harder on O2 sensors but we have not had much of an issue. We would suggest picking up another O2 sensor if running this tune, or you can run MS109 unleaded fuel.
Level 6 (320-330 crank HP): Built for E-85, this big turbo tune is simply unbelievable. Very similar to the 110 tune power with both the standard 26-27psi tune and the higher boost RACE tune. The difference is this tune runs on cheap corn fuel, or expensive VP corn fuel! This fuel makes the motor run cooler and it absolutely loves it. The only downfall is you go through more fuel, and push more fuel into the crankcase, and into the catch can(necessary mod). If using pump E-85, make sure you are between 70-85% ethanol for this tune. RACE tune is 28-29 PSI with a wicked timing curve that produces the same 267rwhp or 320-330 crank hp.
Max boost levels are listed as reference only. Altitude, temperature, charge temps, intercooler temps and many other conditions play into a factor of final boost output. AA tunes do a better job of making sure you reach these levels as the factory tunes are overly safe.
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.
High Load Helix 1062: Slightly less aggressive than the performance helix with good acceleration gains/power transfer over the OEM helix. Designed to work better for heavier vehicles, heavier tires, heavy sand load or crawling type riding in mind. Excellent all around helix for any Pro XP or Turbo R/Pro S!
Pro XP 2 Seat: Works well with 30-35" Dirt Tires, 30-32" dune paddles
Pro XP 4 Seat: Works well with 30-35" Dirt Tires, 28-32" dune paddles
Turbo R/Pro S 2 & 4 Seat: Works well with 32-37" Dirt Tires or 30-33" paddles.
Performance Helix 1065: Aggressive helix with acceleration/higher horsepower/aggressive fast pace drivers in mind. Works best with a tuned vehicle. Not suggested for Turbo R/Pro S 4 seat models.
Pro XP 2 Seat: Works well with 30-32" Dirt Tires, 30-32" dune paddles
Pro XP 4 Seat: Works well with 30-31" Dirt Tires, 28-30" dune paddles
Turbo R/Pro S 2 Seat: Works well with 32-33" Dirt Tires.
EBS (Engine Braking) Options:
Keep EBS: Like factory. Most slower pace riders (mud, crawling or very hilly terrain) will keep the EBS in place. Gets rid of the chatter noise but there is a decel whine.
Remove EBS: Removes the EBS pocket in the helix. Gets rid of the roller clunk noise but there is a decel whine. Most faster pace trail riders/racers or dune riders will choose to remove it.
Kits are free shipping to US 48 States ONLY. If you need to purchase from out of the country (or AK/HI) please email, or we will send you a bill for shipping after you order.
Oh... and get ready for your RZR to flat out rip! Clutch kit includes setup guideline that lets you know how to setup your weights for tire size & tune level (Works with 29" - 35" Tires)
If needing extra shims to align your clutch properly, we recommend our P90X Secondary Clutch Alignment Shim Kit.
Optional to upgrade to our HD primary clutch. If upgrading to the HD primary clutch, you will need the P90X clutch puller to pull your OEM clutch. Option to add the standard Polaris puller if you ever need to pull our HD primary clutch.
If sticking with the OEM primary clutch, we highly suggest our optional Revolver Tower Lock Cover

 

Features:

• Kit includes iridium spark plugs as the Pro XP/Turbo R/Pro S models have had issues with low power/bad plugs. A fresh set of plugs and longer lasting iridium plugs have been the cure.
• Quicker throttle response and power delivery
• Throttle by wire limiters disabled
• Fan on/off at 185 degrees Fahrenheit (Stock is 190). The fan also ramps up in power quicker to keep you running cool
• Seat belt limiter disabled
• Speed limiter removed in low and high gears
• More throttle % and boost in low gear and reverse
• Rev limit at a safe 9300 RPM
• No mess of having to send in your ECU & this device is a much safer way of programming. Simply plug in to your Diagnostic port, click tune, wait, and go ride! 
• Very easy to use tuner that can also check and erase most trouble codes
• Easily data log 32 parameters with 1 push of a button and review on your windows computer later
• Tuner is updated with the latest firmware to make sure you have a smooth tuning process

 

Kit Includes:

• AA Big Turbo includes AA billet wastegate
• New cylinder head to turbo gasket
• Exhaust outlet bolts 
• Drain tube o-ring
• PV3 Tuner
• S3 Clutch Kit
• Butter Shift Washers
• Clutch Limiter
• Billet BOV w/Filter
• Exhaust
• Charge Tube
• Post-Airbox Intake Tube (or Intake Tube with Catch Can)
• Iridium Spark Plugs Pre-Gapped

 

Note:

• Does NOT fit 2020 Pro XP models
• Note 2021-Up models have a different helix design and do not need the pre-airbox intake tube. Price difference for years reflects this.
• Start in Any Gear! Does not need to be in park to start. Will start without brake but may throw a code. Press brake to start until we/Dyno Jet figure this issue out. Keep in mind this is removing a safety feature.

 

Fitment:

• Kit fits all 2021-Up Pro XP/Turbo R/Pro S models 2 & 4 Seat

 

Installation Instructions: