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With its streamlined outline and sporty performance, the S4 perfectly personifies the understated luxury that Audi has grown to be best renowned for. But like all mechanical things when first developed, there is room for improvement as far as the S4 performance is concerned. If you are yearning for a rush of power, torque and better fuel efficiency in your S4, replace your S4 stock exhaust with a custom exhaust from CARiD. Stock exhausts have small diameters and a higher number of bends than is necessary. This restricts exhaust flow, causing spent gases to remain stuck within the exhaust system instead of getting dispelled to the outside. As a result, air supply to engine cylinders is hindered and the engine produces a restricted amount of horsepower. Because of their wide diameter, S4 custom exhausts eliminate this problem, enhancing engine efficiency and increasing horsepower by 10-15%.

Some aftermarket exhausts give much higher power gains; it all depends on the level of customization done and the end-goal they are designed to achieve. CARiD sells an entire range of S4 aftermarket exhausts for 1992 - 2011 models, each offering a specific percentage of power gain. The S4 Borla, Magnaflow, Flowmaster, and Weapon-R cat back systems offer a unique combination of power gain, torque increase and engine performance. They are good options if you hope to get all-round performance improvement. For superior power gains, the Audi S4 Magnaflow Cat Back System is ideal. You will save money when you buy your aftermarket S4 exhaust from CARiD. In addition to guaranteed long service - which ensures that you do not buy another custom exhaust unless you want to experiment with a different model - the dealer offers discounted rates on select exhausts, giving you instant savings.

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    • (140 reviews)
      # sp17449
      Exhaust Systems by MagnaFlow®. Muffler Sound: MODERATE. 4" Tubing. These premium line exhaust systems for diesels with particulate filters include mandrel-bent stainless steel tubing, 100% stainless steel mufflers, optional muffler...
      Built In Stainless Steel For DurabilityTuned, Powerful Exhaust Sound
      +2
      $202.60 - $3,904.65
    • (13 reviews)
      # sp839
      Direct Fit Catalytic Converter by MagnaFlow®. If your cat needs replacement, install one that will get you through the smog check and give you more horsepower. This converter will directly replace the factory unit, with little or...
      Reduces harmful emissionsIncreases exhaust flow compared to original factory converter
      $202.45 - $1,748.68
    • (96 reviews)
      # sp229
      Stainless Steel Exhaust System by Borla®. When you want the best performing, best sounding, and highest quality exhaust system, you want Borla. Borla straight-through mufflers and mandrel-bent exhaust tubes are custom tuned to...
      Throatier Exhaust NoteHorsepower and Torque Increased by 7 – 10%
      $315.99 - $3,535.99
    • (1 review)
      # sp8883
      Polished Stainless Steel Twin Pro-Series Side Swept Tip with Tailpipe by Corsa®. The hand polished mirror shine stainless steel Corsa Exhaust Tip is the perfect finishing touch for your exhaust, making it look as good as it sounds.
      Made in Highest Quality Automotive Stainless Steel to Ensure Never-Changing Good LooksEasy Bolt-On Installation
      $117.48 - $540.50
    • (50 reviews)
      # sp228
      S-Type™ Stainless Steel Exhaust System by Borla®. When you want the best performing, best sounding, and highest quality exhaust system, you want Borla exhaust. Borla straight-through mufflers and mandrel-bent exhaust tubes are...
      Aggressive Plus SoundIncreased exhaust flow for better performance
      $349.99 - $3,535.99
    • (8 reviews)
      # sp599
      Touring Series Exhaust System by MagnaFlow®. The Touring Series exhaust systems are tuned for everyday driving, with a deep and mellow exhaust note of true performance character but at a decibel level and tone that does not get...
      Moderate SoundDelivers More Horsepower
      $499.82 - $2,793.70
    • (0 reviews)
      # sp22177
      by Thermal Research and Development® -Stainless Steel Classic Cat-Back Exhaust System. Stainless Steel Classic Cat-Back Exhaust System by Thermal R&D®.
      Designed to boost your vehicle's performanceMade from high-quality materials
      $286.54 - $881.43
    • (0 reviews)
      # sp48909
      Exhaust Manifold by PDI®. Performance Diesel Inc. sets the standard for diesel performance and reliability. All of PDI’s performance products are designed to help you take control of not only horsepower but also make a more...
      High quality at an affordable priceExpertly made from premium materials
      $480.00 - $666.70
    • (29 reviews)
      # sp7280
      Direct Fit Pre-OBDII Catalytic Converter by MagnaFlow®. If your car needs replacement, install one that will get you through the smog check and give you more horsepower. This converter will directly replace the factory unit, with...
      Reduces harmful emissionsIncreases exhaust flow compared to original factory converter
      $79.39 - $1,095.80
    • (4 reviews)
      # sp61427
      Round Rolled Edge Angle Cut Exhaust Tip by Go Rhino®. Finish off your truck style with Go Rhino Exhaust Tips. With constant heating and cooling and exposure to winter road treatments, standard polished stainless steel exhaust tips...
      Easy Clamp-On installation; no cutting, drilling or weldingSatinless Steel Torca AccuSeal™ clamp included
      $22.67 - $55.05
    • (0 reviews)
      # sp35467
      Exhaust Flame Thrower Kit by AutoLoc®. The exhaust flame thrower kit is a must have for all hot rods. This kit can make up to 20’ flames shoot out your exhaust on command.
      Shoot Up to 20' of FlamesRemote activation button
      $94.99 - $189.05
    • (4 reviews)
      # sp18723
      Replacement Exhaust Kit by Walker®. If you are looking for the ultimate in quality and value, then this superior replacement exhaust kit by Walker is what you need. All its components are designed with precision craftsmanship in...
      Direct fit replacementIncludes all applicable flanges, hangers, and sensor fittings
      $28.53 - $1,533.49
    • (0 reviews)
      # sp20762
      Replacement Exhaust Kit by AP Exhaust®. Get confidence with this high-standard OE quality purchase which is perfect for those who want to perform a long-lasting exhaust system repair. Made from top-notch materials, this dependable...
      Superior replacement for your worn out exhaust partHelps put your vehicle back to its tip-top shape
      $25.70 - $1,948.78
    • (12 reviews)
      # sp7036
      EPA Direct Fit Undercar Catalytic Converter by Eastern®. If you need to replace your failed or damaged catalytic converter, this product is the right choice. Designed specifically for your vehicle, this catalytic converter is a...
      Direct OEM replacementConverts harmful engine emissions to less dangerous gases and water vapor
      $41.49 - $789.48
    • (0 reviews)
      # sp4295
      Universal Fit Catalytic Converter by Eastern Catalytic®. Whether your catalytic converter is damaged by road debris or failed due to an engine problem, you definitely need a new one, and this product is the way to go. Made of...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $38.88 - $267.25




    Guides & Articles

    • Performance Exhaust Systems
      Here's A 'Tip': Exhaust Tips Are An Easy Way To Dress Up Your Tailpipe
      Performance exhaust systems give you improvements in power output, sound levels, and appearance, all in one package. But let's face it: not everyone has the spare change to buy and bolt up one of these kits. So you soldier on with what you have. And that may be a tired-looking exhaust system that is still functional. You've spent all day washing and waxing the vehicle's paint and chrome to perfection, but no degree of elbow grease will make that tailpipe look better.
      May 17, 2016
    • Performance Exhaust Systems
      Are Headers Worth The Performance Improvement?
      Engines have often been compared to air pumps, because the engine that’s most efficient in terms of economy and power is the one that can get air in and out of its cylinders the easiest. That’s why most performance modifications like conical air filters, cold air intake systems, headers, and cat-back exhaust systems are aimed at making the intake and exhaust systems less restrictive. These parts increase the flow of air into the engine and ease the flow of exhaust gas out of the engine. Among these components, headers may be the most difficult to install. In this article, we’ll discuss what headers do, their different types, and how much performance they can add to your car.
      August 18, 2015
    • Performance Exhaust Systems
      Are X-pipes and H-pipes Better Than Straight Pipes on Dual Exhaust Systems?
      You may be wondering why so many aftermarket performance exhaust system manufacturers are offering dual exhaust systems connected by "H-pipe" or "X-pipe" sections. After all, aren't two separate pipes, or so-called "true duals", the best for performance? The answer is no, but to understand why we have to examine how a typical internal combustion engine works.
      August 18, 2015
    • Performance Exhaust Systems
      Power, Sound, Looks | Can I Have It All With a Cat-Back Exhaust System?
      It's an age-old question that many have asked. Will an aftermarket exhaust be worth the expense? While they definitely can be, an important question to ask yourself is do you care more about the deeper sound they’re designed to produce, or the added performance gained from being less restrictive? As car enthusiasts, we’ve become accustomed to associating the sound of a car with its exhaust. After all, doesn’t everyone have a childhood memory or two of a car and the particular sound it made?
      August 17, 2015
    • Bed Accessories
      Pickup Truck Cab And Bed Sizes Are Important When Selecting Accessories
      Americans love to have choices. Buying a dress shirt? Decide solid or stripe, short or long sleeve, cotton or poly blend, button or spread collar, regular fit, slim fit, or big & tall. How about a meal at your favorite steak house? Will it be porterhouse, T-bone, or sirloin? Cooked rare, medium-rare, or medium? With baked, mashed, or French fried potatoes? Thirsty for a fancy cup of coffee? Let's not even get started on options that let you end up with a "grande caramel macchiato with 1% low-fat milk, 2 Splendas, and an extra espresso shot".
      April 17, 2015
    • Replacement Exhaust Parts
      Direct Fit vs. Universal Mufflers
      Regardless of whether you're shopping for a simple replacement muffler that delivers original equipment (OE) sound and performance or an upgraded muffler which provides a deeper growl with increased power through freer exhaust flow, you'll see choices between "direct fit" mufflers and "universal" mufflers. In this article, we'll help you understand the differences between these two styles so you can make a more informed purchase.
      August 01, 2014

    Popular Products

    Audi S4 Performance Exhaust Systems Reviews

    Average rating:  5  5 - 1 review
    5 of 5
    Stainless Cat-Back for My 01 S4
    Looks awesome, makes a deeper sound but not that annoying rice car sound; really European and sporty sound. Opened the car up a little bit.
    CPosted by Cody (Templeton, PA) / March 20, 2013
    2002 Audi S4
    Was this review helpful for you? Yes2  people found this review helpful.
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