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    • (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
    • (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
    • (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
    • (0 reviews)
      # sp38324
      by WP EMICO Catalytic Converter (Shipping Restriction). Is your car noisier these days? Can you smell exhaust fumes in the cabin? Exhaust system repairs should not be put off, both for safety and legal reasons, but before you waste...
      OE quality parts from top original equipment and aftermarket manufacturersFast shipping; 1-2 day delivery time regardless of where you're located
      $171.56 - $645.77
    • (6 reviews)
      # sp13664
      Direct Fit Catalytic Converter by Davico®. This direct-fit catalytic converter by Davico will be a great solution to replace your failed or damaged catalytic converter. Once your stock cat fails to perform its job, replacement is...
      Helps your vehicle emit harmless gasesDirect OEM replacement
      $18.21 - $707.98
    • (0 reviews)
      # sp6393
      Exhaust Gasket by Beck Arnley®. For one hundred years, Beck/Arnley has been providing premium OE quality parts for vehicles. Beginning with motorcycle parts in 1914 and transitioning to import vehicles in the 1950’s, brand...
      OE quality products from top original equipmentTop quality materials
      $3.19 - $55.12
    • (0 reviews)
      # sp5330
      Catalytic Converter Gasket by AJUSA®. If you need durable gaskets to prevent leaks on your vehicle, Ajusa is the way to go. Engineered using the latest technologies and global engineering resources, the gaskets meet specific OEM...
      Direct OEM replacement for a proper fitEnsure reliable sealing performance
      $2.10 - $6.80
    • (1 review)
      # sp38930
      Universal Universal Catalytic Converter by Flowmaster®. The new Flowmaster replacement catalytic converters are made to meet and exceed all federal environmental regulations and, as all Flowmaster products, to deliver the best...
      Exceed all federal emission standardsStainless Steel shells
      $64.66 - $324.05
    • (0 reviews)
      # sp76637
      Universal 304 SS High-Flow Catalytic Converter by Stainless Works®. This superior product is made from high-grade stainless steel to ensure excellent quality and maximum resistance to corrosion. Engineered with careful attention to...
      Designed to meet strict quality standardsCarefully crafted from first-rate stainless steel
      $184.50
    • (1 review)
      # sp72983
      Universal High-Flow Catalytic Converter with Metallic Substrate Kit by Pypes®. These Mini converters are 409 stainless for heavy duty applications, but weigh only 2.5 lbs and measure only 11" long. Installed, they only take up 7"...
      409 stainlesss steel construction resists corrosionWith slots and 02 bung
      $141.99
    • (0 reviews)
      # sp47748
      OBD Catalytic Converters (Shipping Restrictions) by Vibrant Performance®. Vibrant Performance Metal or Ceramic Core Catalytic Converters are made entirely of Stainless Steel and feature a Monolith that is far more durable and...
      T304 Stainless Steel ConstructionThese Converters are covered by a 5 year / 50,000 mile warranty
      $75.76 - $448.35
    • (0 reviews)
      # sp65158
      Universal Catalytic Converter by Kooks®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind, this product by Kooks will last a...
      Handles Exhaust Temperatures up to 1500FEliminates Emissions Related "Check Engine Light" (90% Success Rate)
      $136.81 - $142.41
    • (0 reviews)
      # sp65152
      Universal Green Ultra High Flow Catalytic Converter by Kooks®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind, this product by...
      Handles Exhaust Temperatures up to 1500FEliminates Emissions Related "Check Engine Light" (90% Success Rate)
      $353.24 - $379.49
    • (0 reviews)
      # sp58823
      Universal PowerCat Stainless Steel Catalytic Converter by Dynatech®. The Dynatech PowerCAT catalytic convertor uses the latest technology in catalytic convertor design. Utilizing a Premium Metallic Substrate internal design, the...
      Premium metallic substrateSuperior strength and durability
      $174.99




    Audi S4 Performance Catalytic Converters Reviews

    Average rating:  4.5  4.5 - 39 reviews
    5 of 5
    CanAmMex® 00747-212 - Thunderbolt™ Hi-Polished Single Rolled Angled Oval Tip
    These appear to be of very good quality, good welds.
    JPosted by John (Enfield, CT) / February 24, 2016
    Was this review helpful for you? Yes
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