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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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    • (0 reviews)
      # sp7125
      Universal Scavenger X-Pipe Kit by Flowmaster®. The Patented D-Port design of the Scavenger X-Pipe Kit creates a low-pressure area where the exhaust pulse from one pipe helps pull the next exhaust pulse from the other pipe out of...
      $71.08 - $373.93
    • (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
      $511.43 - $2,793.70
    • (130 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
      $202.60 - $3,904.65
    • (47 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...
      $349.99 - $3,535.99
    • (91 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
    • (0 reviews)
      # sp15613
      Track Edition 304 SS Exhaust System by AWE Tuning®. Main Piping Diameter: 2.5". Sophisticated sound and impressive performance. Featuring a straight-through design, the Track Edition Exhaust revamps the attitude entirely, providing...
      Max gains of 7 Hp and 7 Ft/lbs of torque to the crankEngineered, designed, and manufactured in-house at AWE Tuning
      $547.40 - $3,675.40
    • (0 reviews)
      # sp15616
      Touring Edition 304 SS Exhaust System with Polished Silver Tips by AWE Tuning®. A grin-worthy soundtrack coupled with signature AWE Tuning performance and quality honed over decades of supercar engineering. Let’s get ready to...
      Max gains of 10 Hp and 19 ft-lbs of torque to the crankSophisticated Touring Edition
      $547.40 - $4,319.40
    • (36 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
      $202.84 - $1,748.68
    • (26 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
    • (1 review)
      # sp4400
      Race Series Bullet Muffler by DynoMax®. This dyno tested and track proven muffler features unrestricted, straight-through design for maximum horsepower and CRF Technology for sound reduction. Its 100% welded construction ensures...
      Unrestricted, straight-through design for a dyno tested and track proven increase in horsepower and torqueEngineered to provide a deep race sound
      $20.03 - $75.78
    • (4 reviews)
      # sp4401
      Super Turbo™ Muffler by DynoMax®. Get improved exhaust flow and reduced back pressure for better performance, and a mellow tone without annoying interior resonance, with this Super Turbo Muffler. Its patented flow directors and...
      Constructed to increase horsepower and torque thanks to improved exhaust flowAluminized steel Super Turbo muffler maintains a mellow performance tone
      $48.86 - $152.61
    • (2 reviews)
      # sp4403
      This muffler-back exhaust system includes pipe, clamps, tip, and Ultra Flo Welded muffler that features unrestricted, straight-through design for a dyno-proven increase in power and maintains a deep throaty tone while absorbing...
      Unrestricted, straight-through design for a dyno-proven increase in horsepower and torqueEngineered to give your car a deep performance tone
      $66.15 - $216.24
    • (1 review)
      # sp4406
      VT™ Muffler by DynoMax®. The revolutionary DynoMax VT performance muffler will give your vehicle a deep, throaty sound and eliminate drone while increasing exhaust flow and horsepower. It is built using the exclusive DynoMax...
      Unrestricted, straight-through design for a dyno-proven increase in horsepower and torqueExclusive DynoMax Valve Technology delivers on-demand, drone-free performance and sound
      $90.87 - $237.42
    • (1 review)
      # sp8504
      Exhaust Tip by aFe®. This stylish exhaust tip will be the finishing touch for any exhaust system. Made of the finest stainless steel, it's available in a highly polished finish or powder coated wrinkle black. Each features the aFe...
      $55.00 - $595.00
    • (0 reviews)
      # sp13163
      Xlerator™ Stainless Steel Exhaust Tip by AP Exhaust®. Today’s exhaust performance market continues to cover a broad spectrum of vehicles. The unique nature of this market is that a product demand is not based on vehicle age or...
      Made from first-rate materialsEnsures outstanding durability
      $6.16 - $73.13




    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.
    • 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.
    • 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.
    • 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?
    • 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".
    • 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.

    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) /
    2002 Audi S4
    Was this review helpful for you? Yes2  people found this review helpful.
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