Top 20 Best Audi S4 4.2 Performance Upgrades Reviews Comparison

We all know that the best audi s4 4.2 performance upgrades is one of many out there. That’s why we’ve taken 51916 reviews from top experts and organized them according to our rankings for you. 

We know how hard it is to find a great audi s4 4.2 performance upgrades, which is why our team went through the whole research process and put up this list for you. These are just some of their favorites!

We have been exhaustive in our search for the perfect audi s4 4.2 performance upgrades of 2025. If quality matters most, then check this list: 

Bestseller No. 1

PEDAL COMMANDER for Audi S4 2009-2016 Throttle Response Controller - Fits 4th Gen, 3.0T Premium, Premium Plus, Prestige, 4.2 Quattro Cabriolet, Audi S4 Accessories

• Faster Acceleration: Are you looking for Audi S4 performance parts or Audi S4 accessories that improve your driving experience? Pedal Commander tunes the delay from your electronic gas pedal, allowing your Audi S4 to accelerate faster, giving your vehicle a night/day difference in performance
• 36 Adjustable Settings: Equipped with 4 different modes: Eco, City, Sport, and Sport +. Each mode has an additional 36 adjustable settings to fine-tune to your liking, making this a must have Audi S4 accessory
• Eco Mode: The Pedal Commander throttle response controller significantly slows throttle response to improve efficiency
• Quick & Easy Installation: Pedal Commander is a simple plug-and-play device that takes only about 10 minutes to install. Now Bluetooth compatible, you can control the unit using our free Pedal Commander app
• Will Not Void Your Warranty: Pedal Commander will not void the warranty on your Audi S4 or leave any trace behind on your ECU

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Bestseller No. 2

Steering Knuckle Front Right Replacement For Audi A4 8E B6 B7 S4 RS4 Quattro 2002-2009 8E0407254F 8E0407254H GLOSSY AUTO PARTS

• A4 Suspension Steering Knuckle Front Right
• OE Part Number: 8E0407254, 8E0407254C, 8E0407254D, 8E0407254E, 8E0407254F, 8E0407254H, 8E0 407 254, 8E0 407 254 C, 8E0 407 254 D, 8E0 407 254 E, 8E0 407 254 F, 8E0 407 254 H
• Replacement for Audi A4 1.8L 2002-2006; A4 2.0L 2005-2008; A4 3.0L 2002-2005; Audi A4 3.2L 2005-2008
• Replacement for Audi RS4 4.2L 2007-2008; S4 4.2L 2004-2009
• Warranty for 12 Months

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Bestseller No. 3

cciyu NCV23011 CV Axle Shaft Assembly Fit For Audi A4 allroad A5 Quattro 2.0L For Audi RS5 2.9L 4.2L Sportback 2.9L,For Audi S4 S5 3.0L 4.2L 2008-2021 Front Left Right

• FITMENT: 2009-2018 For Audi A4 2.0L,2017-2021 For Audi A4 allroad 2.0L,2021 For Audi A4 Quattro 2.0L,2010-2014 For Audi A5 2.0L,2021 For Audi A5 Quattro 2.0L,2021 For Audi A5 Sportback 2.0L,2018-2021 For Audi RS5 2.9L,2013-2015 For Audi RS5 4.2L,2019 2021 For Audi RS5 Sportback 2.9L,2010-2021 For Audi S4 3.0L,2010-2021 For Audi S5 3.0L,2008-2012 For Audi S5 4.2L,2018-2021 For Audi S5 Sportback 3.0L
• REPLACE NUMBERS: 8K0407271Q,8K0407451DX,NCV23011,66-7418,667418
• SPECIFITICATIONS: Position: Front Left Right;Inner Spline Count: Bolt-Spline;Outer Spline Count: 42 Spline;Compressed Length: 466mm;ABS Ring Included: No;Axle Nut Included: Yes
• QUALITY: All components are closely inspected to meet the stric quality standards to ensure that all CV Axles meet OE form,fit and function,long lifetime
• NOTICE: Please make a purchase after checking the description and the model suitability. If you have any questions, you can communication with us

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Bestseller No. 4

Road Top Wireless Carplay Android Auto for Audi A4 A5 S4 S5 RS4 RS5 Q5 2008-2015 with 3GMMI System, Carplay Retrofit Kit, Support Mirrorlink, Siri, Navigation, Camera

• Suitable vehicle: Road Top Wireless Carplay Retrofit Kit Decoder fit for Audi A4 A5 S4 S5 RS4 RS5 Q5 2008-2015 with 3GMMI System. Only fit for MMI 3G System.Not fit for MMI 2G System.Especially for 2009 car, please check our website picture to make sure your factory car knob position firstly
• Note: Not fit for Concert or Symphony radio.If your Audi has radio control knob between LCD screen and climate control panel, and if it says Concert or Symphony Radio on top of the radio, then you have Concert or Symphony radio
• A CarPlay interface decoder box: Not a car screen. You just need to remove the dashboard and connect it to the original CD host device using our wires. After installation, your car not only keep original car system, but also add more functions
• More Functions: Support wireless/wired carplay, wireless/wired Android Auto, mirrorlink, Watch video, TV news, Photos, Navigation. Support siri and google ok voice control, keeps your hands always on your steering wheel during driving
• Reverse Camera: Support factory original reverse camera, parking radar; Support aftermarket reverse camera and 360 camera; Support front view camera DVR(CVBS input)

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Bestseller No. 5

Marsram Ignition Coil Pack UF529 for 2005-2016 Audi A3 A4 A5 R8 A6 A7 Q7 S4 TT 2006-2016 Volkswagen VW Jetta MK5 MK6 GTI Rabbit Golf Passat CC Tiguan Replacement for 06E905115E 06E905115F 4pcs

• Ignition Coils Compatible with AUDI: 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 Audi A3 2.0T / 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Audi A4 2.0T 3.2L / 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Audi A5 2.0T 3.2L / 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Audi A6 3.2L,4.2L 3.0T / 2012, 2013, 2014, 2015, 2016 Audi A7 3.0T / 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 Audi R8 Coil Packs 4.2L,5.2L
• Ignition Coils Compatible with AUDI: 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Audi Q5 3.2L,4.2L 3.0T / 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Audi SQ5 3.2L, 4.2L 3.0T / 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Audi Q7 4.2L 3.0T / 2010, 2011, 2012, 2013, 2014, 2015, 2016 Audi S4 3.0L / 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Audi S5 4.2L / 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 Audi TT / TTS Coil Packs 2.0T
• Ignition Coils Compatible with VOLKSWAGEN: 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 Volkswagen MK5 GTI 2.5L / 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 Volkswagen MK6 GTI 2.5L / 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 Volkswagen MK5 Rabbit 2.5L / 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 Volkswagen MK6 Rabbit Coil Packs 2.5L
• Ignition Coils Compatible with VOLKSWAGEN: 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 Volkswagen Golf 2.5L / 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 Volkswagen Jetta 2.0T / 2006, 2007, 2008, 2009, 2010 Volkswagen Passat 2.0T / 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Volkswagen CC 2.0T / 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Volkswagen Tiguan Coil Packs 2.0T
• This Coil Pack is Compatible with: 06E905115E, 06E905115F, UF529, 06E905115A, 06E905115C, 5C1688, UF-529, 07K905715F, 06H905115B, C1631, E1029, UF529

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Bestseller No. 6

Front Right Steering Knuckle Replacement for Audi A4 Allroad A5 Q5 S4 S5 4.2 TFSI 8K0407254R Flynsu

• Front Suspension Steering Knuckle, Steering Knuckle, Right Side, Passenger Side
• OE Part# 8K0 407 254 E, 8K0 407 254 F, 8K0 407 254 G, 8K0 407 254 R, 8K0407254E, 8K0407254F, 8K0407254G, 8K0407254R
• Placement on Vehicle:Front Right, For A4, A4 Quattro, A4 allroad, S4, A5, S5, A5 Quattro, 1.8L, 2.0L, 3.0L TFSI, 3.2L, 4.2L FSI, 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
• Our Advantages: Excellent Quality, Reasonable Price, Perfect, Aftersales Service
• 100% Brand New,24 Months Warranty

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Bestseller No. 7

GTRUI Wireless Carplay Android Auto for Audi A4 A5 S4 S5 RS4 RS5 Q5 2008-2015 with Multimedia System 3GMMI, Car Play Retrofit Kit, Support Camera Mirrorlink Siri Navigation

• 【Compatible Models & Years】 for Audi Q5 2009-2017 , A4(B8)(2009-2016),S4(B8)(2009-2016),RS4(B8)(2012-2015) A5(2008-2016),S5(B8)(2008-2016),RS5(2010-2015)--With “Audi multimedia” system only - Left Driving Vehicles.
• 【Wireless Carplay & Android Auto】 :Install Carplay Retrofit Kit, seamlessly integrate your smartphone with your Audi's multimedia system through wireless CarPlay or Android Auto.
• 【Voice Control】 Use your phone in safety while you drive. by simply saying “Hey Siri” or “OK Google”, to get directions, make calls, send & receive messages, and enjoy your favorite music. Get access to voice commands,Siri & Google Assistant can help you do all of these things. It will free your hands and make your journey safer.Note: Some smart phone maybe unable to connect wireless Android Auto.
• 【Dual Systems】 Long press the ‘NAV’ or ‘MEDlA’ button on the MMI controller to switch from the factory OEM car system to Carplay.
• 【1-Year Warranty】 GTRUI backs this item with a 1-year warranty and provides professional technical support. Please contact us via Amazon email, we will reply ASAP!

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Bestseller No. 8

Bilstein B8 Performance Plus Front & Rear Shock Absorbers Kit For Audi S4 A4 RS4

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SaleBestseller No. 9

Real Carbon Fiber Trunk Spoiler for Audi A4 S4 2017-2024 B9 Sedan Rear Trunk Lip HighKick Wing Spoiler Body Kits Factory Outlet

• Custom Fit:This carbon fiber rear spoiler fits for Audi A4 B9 / A4 B9 Sline / S4 Sedan 2017 2018 2019 2020 2021 2022 2023 2024
• Quality Material & Durable:The Rear Spoiler for Audi A4 is made of Real Carbon Fiber,a material that is popular in high-techs,featuring high stiffness,high tensile strength,light weight,and high-temperature tolerance.
• Easy Installation:Free glue tape included,3D design,CNC moulding,test installation on real car,Excellent fitment.
• Performance Functional :The Rear Wing for Audi A4 can maintain the stability of the vehicle when at high speeds,reducing wind resistance,saving fuel,and keeping safety,make the driver feels more comfortable.
• Superior service: If there is anything we can do for you, please feel free to contact us.

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SaleBestseller No. 10

A-Premium Front Suspension Steering Knuckle Compatible with Audi A4 A4 Quattro 2010-2012, A5 2011-2012, A5 Quattro, allroad 2013-2016, Q5, S4, S5, Left Driver Side

• [Vehicle Fitment]: Compatible with Audi A4 2010-2012 L4 1.8L/2.0L, A4 Quattro 2010-2012 L4 2.0L/V6 3.2L, A5 2011-2012 L4 2.0L, A5 Quattro 2010-2011 L4 2.0L/V6 3.2L, allroad 2013-2016 L4 2.0L, Q5 2010-2012, S4 2010-2012 V6 3.0L, S5 2010-2011 V8 4.2L, --- with 320mm rotor
• [Installation Position]: Front Left Driver Side
• [Professional Replacement]: This steering knuckle is the replacement for above model's suspension system, and may help you resolve those problems: ① hard braking ② difficult turning of wheels ③ uneven tire wear ④ abnormal shaking
• [Specification]: Condition: Brand New; Material: Forged Aluminum; Hub Included: No; Axle Included: No; Ball Joint Included: No; About Guarantee: 1-Year (12 Months)
• [Reference Part Number]: 8K0407253AA, 8K0407253AB, 8K0407253AA, 8K0407253AB

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How Do We Test Audi S4 4.2 Performance Upgrades 

If you’re looking for an unbiased opinion on any product, we’ve got your back. Our reviews are rigorous and thorough – taking all factors into account including design, features, price-to something else that matters most in making an informed decision before purchasing one of these items!

Factors to Consider Before Purchasing Audi S4 4.2 Performance Upgrades

What’s the point of a buying guide if you don’t know what factors to consider before purchasing products?

• Satisfy your need
• Features & Specifications
• Quality & Durability
• Brand Value
• Customer Reviews & Ratings
• Price
• Customer Service

You may be wondering why you need to consider some factors about a product before purchasing. It’s because there are so many things that can go into making your decision, and knowing all of them upfront will help keep any surprises later on in life!

What’s The Best Place To Purchase Audi S4 4.2 Performance Upgrades

Online shopping is the way of 2025, and if you want to make sure that your purchase will be an excellent one then there’s no better place than online. You’ll have access to so many more products in different shapes sizes colors flavors brands with unbeatable prices.

There are so many different options when it comes to choosing a new product, and we truly believe that you should do your research before making such an important purchase. The questions might include:

• Should I buy a new, used or refurbished audi s4 4.2 performance upgrades?
• Do you really need the high quality audi s4 4.2 performance upgrades there is?
• What are must-have features for audi s4 4.2 performance upgrades?
• Best time to buy a audi s4 4.2 performance upgrades?
• What are the benefits of buying audi s4 4.2 performance upgrades?
• Why is it critical to invest in a good, particularly the best one, in today’s market?

In our opinion, investing in a good, high-quality product will make you feel confident about your purchase. You can tell that the company put effort into making sure it was top-notch and took their time with designing everything from packaging to graphics for marketing purposes because this makes them seem more reliable than competitors who don’t invest so much money on these things (especially if they’re cheap). Plus having quality materials ensures longevity which is always nice. 

Tips For Being A Smart Online Shopper

When shopping for a product online, be sure to read the reviews before making a purchase. This can give you a good idea of what to expect from the product and can help you decide if it’s the right fit for your needs. Additionally, be sure to check the return policy and shipping times before buying anything. This way, if you’re not happy with the product, you can easily return it without any hassle. And if you need the product quickly, you’ll know that it will arrive in a timely manner.

When looking for a product, be sure to compare prices from different retailers. This way, you can be sure you’re getting the best deal possible. Additionally, be sure to read the fine print before making any purchase, as some retailers may have hidden fees or charges. By taking the time to do your research, you can be sure you’re getting the best possible deal on the product you want.

These are just a few things to keep in mind when shopping for a product. By taking the time to consider your needs and doing your research, you can be sure you’re getting the best possible product for your needs. And if you have any questions, be sure to contact customer service or the retailer before making your purchase.

FAQs About Best Audi S4 4.2 Performance Upgrades

What is More Important: a Good Product Or a Good After-sales Service?

When it comes to choosing a product, many people prioritize the quality of the product itself. However, after-sales service can be just as important, especially if something goes wrong with the product. So when it comes to choosing a product, it’s important to weigh both factors and decide which is more important to you. If quality is your main concern, be sure to choose a product that comes from a reputable brand and has good reviews. However, if you’re more concerned with after-sales service, be sure to choose a product from a company that offers excellent customer service. 

How to Save Money When Buying Online? 

When shopping for a audi s4 4.2 performance upgrades online, there are a few things you can do to save money. First, be sure to compare prices from different retailers before making a purchase. This way, you can be sure you’re getting the best deal possible. Additionally, be sure to read the fine print before making any purchase, as some retailers may have hidden fees or charges. By taking the time to do your research, you can be sure you’re getting the best possible deal on the product you want.

Conclusion

We’re always looking to improve the way in which we give you access, so be sure not miss out on all of our great updates by visiting us online right now.

We’re here for you. We’ll help answer any questions or concerns about the product as long as they don’t involve technical details like how it works in a general sense! If there’s anything else on your mind, please let us know because someone will be happy to assist immediately-we want this process easy and breezy.

As a prospective buyer, it’s important that you research the product thoroughly before purchasing. There are many online forums where people can share their knowledge and experiences with different products in order to help guide your decision on what is best for yourself.

With our guide, you can find the best audi s4 4.2 performance upgrades available on Amazon. We make use of Big Data and AI data to compile this list so it is highly accurate.

The process of creating this content was challenging, but our team persevered through it to bring you the best possible results. We read user reviews and looked at what buyers think about each product so that your buying experience will be satisfying.