SKU: 37845355810

Group 5: Polo GTI 6c 192hp/ Audi A3 8V 1.8Tfsi 180hp (Non-US)

$301.38 $334.87
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Description

Group 5: Polo GTI 6c 192hp/ Audi A3 8V 1.8Tfsi 180hp (Non-US)JB1 Stage 1 Group 5 The JB1 is a true user adjustable plug and play solution for all MQB based models in the VW Audi Group range. Power Gains: Starting at 30whp and 35ft lb with 91 octane with + 4. 0psi boost over stock on the default setting. Engine estimates are 50bhp gained and 45ft lb JB4 Group 5 The JB4 is a true user adjustable plug and play solution for all MQB based models in the VW Audi Group range. Power Gains: Starting at 45bhp and 40ft lb

JB1 Stage 1 Group 5

The JB1 is a true user adjustable plug and play solution for all MQB based models in the VW Audi Group range. Power Gains: Starting at 30whp and 35ft lb with 91 octane with + 4.0psi boost over stock on the default setting. Engine estimates are 50bhp gained and 45ft lb

 

JB4 Group 5

The JB4 is a true user adjustable plug and play solution for all MQB based models in the VW Audi Group range. Power Gains: Starting at 45bhp and 40ft lb with 91 octane/95Ron with + 4.5psi boost over stock on the default setting. Up to 60bhp and 60ft-lb with bolt on modifications, higher octane and boost adjustment with the optional BMS Data Cable.

The JB4 features CANbus connectivity for more advanced tuning, direct AFR control, advanced safety systems for boost, air/fuel ratio, fuel trims, and engine knock, boost mapping by gear for improved traction, integrated water/meth control, and much more.

The unit can be used with our JB4 Bluetooth Connect kit providing for full in car engine parameter display, map switching and adjustment Support is also provided for the IS20 turbo upgrade providing for outputs past the 300hp level.

Wirelessly connect the JB4 to your Bluetooth 4.0 compatible iOS and Android device via the JB4 Mobile connect kit, or to your Windows laptop with the BMS data cable. Both options allow you to record and analyze vehicle and tuning data, change JB4 performance maps, and update JB4 firmware as we release free newer versions with updates, more powerful maps, and new features under development. Separate JB4 Mobile app purchase also required.

JB4 Features and Benefits

• Improves 0-60 times and 1/4 mile times
• Preloaded with custom tuning software and up to 8 maps for various fuel and modification levels
• The JB4 offers a lot more performance, functionality, and safety than your average performance chip
• Quick Plug & Play Installation
• CANbus OBDII integration offering unrivaled tuning features and performance
• Improved performance over non-integrated chip tunes
• Runs as smoothly as stock, this is how your vehicle should have come from the factory
• Compatible with all driving modes
• Fuel economy unchanged during normal driving
• Compatible with JB4 Mobile for smartphone logging, tuning changes, and adjustment
• 91 octane fuel or better required for performance gains
• Ethanol (E85) compatible tuning maps
• Able to read/delete fault codes
• Not VIN locked and can be removed without a trace and resold down the road
• Made in the USA
• Free USA Shipping
• 5 year warranty

 

APPLICATIONS

Volkswagen
• VW Polo 6C GTI 

Audi
• Audi A3 8V 1.8T FSI Non-US 
• Audi A1 1.8TFSI

Skoda
• Skoda Octavia 1.8T FSI

Seat
• Seat Leon SC FR 1.8TSI 
• Seat Ibiza Cupra 1.8TSI

For any VW/Audi sales, support, and technical questions please contact George at [email protected] George is the only BMS representative familiar with the VW/Audi platform.


DYNO RESULTS 

Audi 1.8TFSI before and after at the wheels

Download Install Guide / JB4 App

  • Download JB1 Stage 1 Install Guide
  • Download JB4 Install Guide
  • Download JB4 iPhone App
  • Download JB4 Android App

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    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: 37845355810

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    4.6 ★★★★★
    Based on 14 reviews
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    A Viking
    San Leandro, US
    ★★★★★ 4
    Great for what it does but not a miracle
    Style: 30 sqft
    Sticks well. Definitely thicker and nicer than the Kilmat version. If I were buying again I would just buy more of this, the value is better even though you get less total coverage per pack. Can be cut to size easily, we used a box cutter which got a little gummed but but not too bad. we were able to get it in and around everywhere we needed to put it and it held up well as we were mashing it into weird spots. It doesnt smell hardly at all while being applied and once its on there is no smell whatsoever The product is great for what it is. 4 stars only because I think it gets oversold for how much this alone can do. We did notice a slight reduction in noise but nowhere near the multiple decibels we see claimed everywhere. If your vehicle is mostly quiet but just has that little bit getting through this will probably do wonders, If you have a vehicle where there's significant engine noise in the cabin you'll need more than just this to bring that down.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on September 12, 2025
    J
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    JaroldHarold
    Omaha, US
    ★★★★★ 5
    Great product!
    Style: 30 sqft
    I can say this product makes a huge difference with road noise and is cleaner and easy to work with when applying compared to other mats that cost about the same price.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on February 14, 2026
    I
    Verified Purchase
    Iraq veteran 83
    Los Angeles, US
    ★★★★★ 5
    Very heavy and thick
    Style: 30 sqft
    I purchased mini brands of sound ending and this is by far the heaviest sound deadening I've ever ordered. I'm not installed yet but I have a good feeling that is going to work exceptionally in blocking sound. If weight is a concern for you I would recommend a lighter product however if sound quality and a quiet ride is your priority this is the one for you.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on March 18, 2026
    D
    Verified Purchase
    Dustin Felton
    Waukegan, US
    ★★★★★ 5
    Siless Hybrid 3-in-1 - Far Exceeded my Expectations!!!
    Model: SLH20025
    I recently installed the Siless Hybrid 3-in-1 sound deadening mat in my vehicle, and I’m genuinely impressed. For just $80 for 25 square feet, this product delivers performance that rivals materials costing twice as much — and with far less hassle. If you're on the fence......Just buy it! You will not be disappointed. Easy to Install: Unlike traditional sound deadening products that are stiff, sharp, and temperature-sensitive, this mat is soft, flexible, and easy to work with. I cut it cleanly with regular scissors and pressed it into tight spaces using just my fingers, so if in you don't have a roller or install tool, a good pair of scissors and your hands can get the job done. With other brands like Dynamat, the aluminum layer often leaves micro cuts on your hands and tears up your fingertips, but Siless does not due the acoustic layer being on top and above the aluminum layer that holds the butyl layer. So, it's very easy on your hands. Even in cooler temperatures (around 50°F), I had no trouble applying it but it goes on better heated. If warm outside, I would leave the entire box out in the sun for at least 30 minutes when it's warm or heats it's very pliable and easy to mold. Make sure its where you want it because once applied it's not ever falling off. and it became even more pliable and easy to mold. No heat gun, no mess — just straightforward application. I installed 40–50 square feet throughout the interior, covering everything except the headliner and the flooring forward of the rear seat. The difference in cabin noise is astonishing. I can turn my radio up concert loud with gut-punching bass, and from outside the car, it sounds like a factory sound system at mid volume. I was blown away by how well it contains sound — both inside out and outside in. My exhaust is pretty aggressive and now is barely audible from inside the cabin. While driving, it almost sounds like a stock factory setup. The Siless matting actually changed the driving experience and feels refined. If you're skeptical about sound deadening gimmicks, I get it, but this is the first product I've used and when I needed more, I went Stright to the 3 in 1 Hybrid matting and purchased it again. I love researching before buying and that's very uncommon for me to do. Note: Proper installation is key, and it does take time and patience. But if installed correctly and in the right places, it works better previously used from paint-on sound deadening to Dynamat. Update Nov, 2025 After using it this in 4 separate vehicles now. I feel the Siless’s 3 in 1 Hybrid has nailed it for best budget deadener that is better than dynamat extreme in performance and installation Protip: buy a roll of 2-3” aluminum tape and tape the seams. After trimming the edges tend to very sticky between the panels. I ran a strip of aluminum tape over the seems to create a better seal and true moisture I used it on four vehicles now and have I have not been paid to review and purchased every order myself. 3 in 1 Hybrid deadener by Siless is the best all around easy to apply sound deadner period!
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on September 29, 2025
    T
    Verified Purchase
    Tee & Cee
    Belleville, US
    ★★★★★ 5
    Top quality
    Model: SLH20025
    This Siless Hybrid 3-in-1 sound deadening mat is easy to work with and feels high-quality. The butyl material is thick and pliable, making it simple to cut and fit into doors, floors, or panels. After installation, road noise and vibrations are noticeably reduced, and it also seems to improve the overall cabin feel. No bad smell. At 25 sq ft per roll, it’s a good value for anyone looking to dampen noise and improve car acoustics. Overall, a solid, effective option for automotive soundproofing. Used on a Fiesta ST.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on February 15, 2026

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