Burger Motorsports B9 S4 Water Injection Kit
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 Jul 5 - Jul 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:
  1. 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
SKU: 44122153362

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Marvinsmom
Pawtucket, US
★★★★★ 3
Basic everyday napkins but very thin
These are about as basic as paper napkins get. They work fine for everyday meals and quick cleanup, but they are definitely on the thinner side. You usually end up needing more than one for messier foods or larger spills because they don’t feel especially absorbent or heavy-duty. That said, the large count is convenient for everyday household use, cookouts, lunch packing, or casual gatherings where you go through napkins quickly. Overall they’re functional budget napkins, just nothing particularly thick or special.
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Reviewed in the United States on May 28, 2026
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Tammy C
Cuba, US
★★★★★ 5
Good purchase
Good price, not bad quality.
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Reviewed in the United States on May 8, 2026
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Scott
Pawtucket, US
★★★★★ 5
Solid Choice for Everyday Use
Would definitely order again when I run out. Sometimes the basics done well beat the alternatives trying too hard to be special. If you're looking for dependable napkins that won't let you down during dinner or cleanup time, these deliver. No fancy features, no gimmicks - just straightforward functionality at a fair price.
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Reviewed in the United States on April 15, 2026
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TB1
Cuba, US
★★★★★ 5
Good value, good product
These are fine for the money. Absorbent, strong enough. Good value, will re-order these.
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Reviewed in the United States on May 16, 2026
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Ashley F.
Grantham, US
★★★★★ 5
Simple, Durable, and a Great Pantry Staple
I bought these because they were inexpensive, and they turned out to be exactly what I expected in a good way. They’re durable, have the size and softness of a standard everyday napkin, and the absorbency is solid for normal meals and spills. The pack is a good size—it fits easily in my pantry but still holds a lot of napkins, so it lasts a long time before needing to restock. If you’re just looking for simple, reliable napkins at a great price, these are a really good value.
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Reviewed in the United States on March 12, 2026

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