SKU: 44122153362

Burger Motorsports B9 S4 Water Injection Kit

Sale price$370.06 Regular price$411.18
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Ships within 48 hours · Estimated delivery Aug 5 - Aug 10

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Description

Burger Motorsports B9 S4 Water Injection KitWater Methanol Alcohol injection commonly referred to as WMI allow you to make tremendous amounts of power on pump gas. The effect is similar to running 100 octane race gas or E85 fuel all the time with the additional cooling benefits allowing for more power than you can make on race gas or E85 alone. The key to a safe and effective WMI setup is tuning integration. The Audi B9 S4 BMS WMI kit integrates to the JB4 tuning system allowing for precise

Water/Methanol/Alcohol injection commonly referred to as WMI allow you to make tremendous amounts of power on pump gas. The effect is similar to running 100 octane race gas or E85 fuel all the time with the additional cooling benefits allowing for more power than you can make on race gas or E85 alone.

The key to a safe and effective WMI setup is tuning integration. The Audi B9 S4 BMS WMI kit integrates to the JB4 tuning system allowing for precise mapping based on boost, throttle position, engine speed, intake temperature, advance, gear, and other data elements available to the JB4 through its CANbus system. In addition a pump flow signal is fed back to the JB4 allowing for a safe and smooth progressive boost mapping. If the tank runs empty or flow drops for any reason the JB4 will safely back down performance to avoid detonation. Boost is held low until WMI is properly flowing to avoid tip in knock common with non-integrated WMI setups. In addition WMI can be activated or disabled right from the JB4 Mobile app , will automatically disengage during traction control or safety map situations, and WMI flow data can be displayed via your JB4 Mobile logging device. 

The BMS WMI kit includes a high quality Aquatec WMI pump made to our specifications, high speed solenoid with leak-free compression fittings, a WMI filter, and all required wiring and mounting hardware. For the Audi B9 S4 You can select from our lower cost 1 gallon clear tank for a custom mount or our universal 2 gallon integrated tank.

For the Audi B9 S4 we also offer a unique direct fit CNC machined nozzle adapter allowing quick and easy installation of the suggested dual BM5 nozzles. The adapter eliminates the need to replace your otherwise sturdy factory chargepipe for nozzle mounting.

Dual BM5 is the recommended nozzles for Audi B9 S4 BMW engines with factory turbo.

What's inside our methanol injection nozzles?

Audi S4 WMI Nozzle Adapter

This CNC machined plug and play adapter allows you to mount single or dual BMS WMI nozzles WITHOUT the expense and headache of removing and drilling your factory chargepipe. Shaves a ton of time off the Audi S4 WMI install and best of all is fully reversible. We suggest the BM10 nozzle for most S4 applications. Nozzles not included. Made in the USA.

1 gal. UNIVERSAL TANK

1 gallon universal tank: The least expensive option this tank is compact and flexible allowing for a wide range of mounting on any flat vertical surface in the trunk. The tank is clear to allow visually checking the fluid level. 

Comes with standard 2 way vented black plastic cap. 
Upgraded billet lid with 1-way check valve available below.

Tank dimensions: L 11" x W 9" x H 4.5"

Applications
Universal trunk mount

 

2 gallon universal low profile tank
With our 2 gallon universal tank the WMI pump mounts directly to the tank for the ultimate easy to install tank. This tank is compact allowing for a wide range of mounting on any horizontal surface in the trunk. Offered in black and in clear to allow visually checking the fluid level. Works with all DDP 5800 pumps. Made in USA.

Comes with standard 2 way vented black plastic cap. 
Upgraded billet lid with 1-way check valve available below.


Tank dimensions: L 15.5" x W 8" x H 8.25"

Applications
Universal trunk mount

CAP UPGRADE

Optional Upgraded Billet WMI tank cap w/safety check valve

This high quality custom billet WMI cap includes an integrated check valve to let air in and prevent dangerous WMI vapor/fumes from getting out! Made in USA.

Applications
• BMS 1 gallon tank
 BMS 2 gallon universal tank
 BMS 2 & 3 gallon stealth tank


INSTALL GUIDE

Download Install Guide

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • 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
SKU: 44122153362

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Germán Murcia
San Leandro, US
★★★★★ 5
Great Scale
Size: 3 kg - Normal Size, Size: 3 kg - Normal Size
Great quality, it’s weight precision it’s great, easy to celan, the battery life it’s god, the value for money it’s god as well, and it’s the perfect size compact and functional to many coffee preparation even Chemex 8 cup size.
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Reviewed in the United States on December 18, 2025
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Compulsive Consumer
Waukegan, US
★★★★★ 5
Accurate and easy to use
Size: 3 kg - Normal Size, Size: 3 kg - Normal Size
At the moment, I can't think of anything I dislike about this scale. The buttons are responsive, the measurements are accurate (I checked the readings with a couple of calibration weights from a scientific scale), the displays are clear. Operation in daily use is very simple. 1. Turn on scale 2. After self test, place carafe and filter 3. Press "T" to tare 4. Add grinds 5. Press "||>" to weigh the grinds. This automatically tares the scale again and sets the timer to standby. It also activates the coffee to water ratio display 6. Add water and the timer automatically starts so you get a precise bloom time. The added water is weighed and displayed as you pour and the coffee to water ratio display gives you an instantaneous reading, so you can brew your perfect cup of coffee each time. The scale has a large capacity and precise resolution so it works for single small cups to large pots. All in all, the best scale I've tried so far and might pick up another one when they go on sale (again). Highly recommended.
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Reviewed in the United States on July 9, 2024
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Verified Purchase
Amazon Customer
Dallas, US
★★★★★ 5
Perfect!
Size: 3 kg - Normal Size
It works perfect. The product looks strong and looks so nice.
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Reviewed in the United States on April 15, 2026
M
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mark
Fort Morgan, US
★★★★★ 4
Mostly Great, But With One Problem
Size: 3 kg - Normal Size
Overall, this is a good scale and I do like it. However, it has one flaw that I'll mention later. First, the things I like. This is a nice looking scale. I like the design and the different colored displays for time and weights. The stainless steel on black is a classic look and very stylish in my opinion. The size is just right for brewing with French press or Chemex style brewers. It has a lot of plastic, but that is how all scales of this size are, especially in this price range. Having the ratio displayed is really nice. I use that about as much as looking at the grams during a pour over. I've also been using the automatic timing feature. I didn't think I'd like that, but it is actually quite useful. I've been using it for a month off of the first charge so I think that the battery life is good. Its also nice to be able to turn off the sound so I don't have to listen to beeping early in the morning when the rest of the family is sleeping. Being able to change the units of measure is great. I've weighed coffee, baking ingredients and even small packages prior to mailing them. It handles anything under 6 lbs. The display is sensitive and reads quickly. Which leads me to the one negative about this thing. When it is weighing room temperature items like beans or an empty brewer, its accurate and gives a steady reading. However, when you start introducing hot items (like brewing coffee which is what this is for) it starts to drop weight by 0.1g every 10 to 20 seconds. Even with the included silicone cover. I've added a cork trivet and another silicone pad under the brewer which didn't seem to help much. Eventually they warm up and the issue starts. Any raise in temp causes the unit to start lowering the weight as previously described. That's why I only gave it four stars. While this is annoying to see, it doesn't seem to mess with the overall brewing ratio or mess up my coffee brewing at all. By the time its doing this, I've usually made my pours and am in the 4 to 5 minute steeping period prior to finishing and decanting. At that point, I'm really only using the timer function anyway. Therefore, I didn't give it a lower rating since I like everything else about it and its not very expensive. All things considered, I think its a good value for the money and gets the job done.
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Reviewed in the United States on May 19, 2026
M
Verified Purchase
MeliMel
Chelsea, US
★★★★★ 5
Accurate and fits Breville bambino drip tray!
Size: 2 kg - Mini Size
Great mini scale! Fits smaller machine drip trays with out over hang. Very accurate!
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Reviewed in the United States on May 27, 2026

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