{"id":2923,"date":"2026-08-26T15:16:40","date_gmt":"2026-08-26T15:16:40","guid":{"rendered":"https:\/\/revexaauto.com\/product\/b58-exhaust-5in-downpipe-catted-or-catless-bmw-g20-g29-m340i-a90-supra-more\/"},"modified":"2026-08-28T03:48:11","modified_gmt":"2026-08-28T03:48:11","slug":"b58-exhaust-5in-downpipe-catted-or-catless-bmw-g20-g29-m340i-a90-supra-more","status":"publish","type":"product","link":"https:\/\/revexaauto.com\/zh\/product\/b58-exhaust-5in-downpipe-catted-or-catless-bmw-g20-g29-m340i-a90-supra-more\/","title":{"rendered":"B58 Exhaust 5in DownPipe Catted or Catless – BMW G20 \/ G29 M340i\/ A90 Supra & More"},"content":{"rendered":"<\/p>\n

Maximize your B58 engine’s performance potential with this 5\u201d high-flow exhaust downpipe<\/strong>, available in both Catted<\/strong> and Catless<\/strong> options. Engineered for enthusiasts who demand serious gains in power, throttle response, and exhaust sound, this downpipe is the perfect first step toward unlocking your turbocharged inline-6’s true potential.<\/p>\n

\n

\ud83d\udd27 Product Features:<\/strong><\/h3>\n
    \n
  • \n

    Massive 5\u201d Diameter Inlet<\/strong>
    Oversized 5-inch turbo inlet for reduced restriction, smoother flow, and increased turbo efficiency\u2014ideal for both stock and upgraded turbos.<\/p>\n<\/li>\n

  • \n

    Available in Two Options:<\/strong><\/p>\n

      \n
    • \n

      Catless Version<\/strong> \u2013 Maximum performance, aggressive sound, and rapid turbo spool. Designed for off-road\/track use only.<\/p>\n<\/li>\n

    • \n

      Catted Version<\/strong> \u2013 Integrated 200-cell high-flow sport catalytic converter<\/strong> offers performance with emissions-conscious street driving.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n

    • \n

      Dyno-Proven Power Gains<\/strong>
      Up to +25\u201340hp<\/strong> and improved torque across the powerband, especially when paired with tuning.<\/p>\n<\/li>\n

    • \n

      Premium Construction<\/strong>
      Built from T304 stainless steel<\/strong> with TIG-welded joints for ultimate durability under extreme heat and pressure.<\/p>\n<\/li>\n

    • \n

      Improved Turbo Spool & Throttle Response<\/strong>
      Significantly reduces backpressure to allow the turbo to spool faster and pull harder.<\/p>\n<\/li>\n

    • \n

      Direct Bolt-On Installation<\/strong>
      OEM-style flanges, brackets, and O2 sensor ports ensure seamless fitment\u2014no cutting or modifications needed.<\/p>\n<\/li>\n<\/ul>\n

      \n

      \ud83d\udce6 Compatible Vehicles (B58 Gen 1 & Gen 2):<\/strong><\/h3>\n

      BMW:<\/strong><\/p>\n

        \n
      • \n

        G20 M340i \/ M340i xDrive (2019+)<\/p>\n<\/li>\n

      • \n

        G29 Z4 M40i (2019+)<\/p>\n<\/li>\n

      • \n

        G30 540i \/ X3 M40i \/ X4 M40i (with B58)<\/p>\n<\/li>\n<\/ul>\n

        Toyota:<\/strong><\/p>\n

          \n
        • \n

          GR Supra A90 \/ A91 3.0L (2020+)<\/p>\n<\/li>\n<\/ul>\n

          Other B58-powered models upon request.<\/p>\n

          \n

          \u26a0\ufe0f Important Notes:<\/strong><\/h3>\n
            \n
          • \n

            Catless downpipes<\/strong> may trigger a check engine light (CEL); recommended to pair with a tune or O2 spacer.<\/p>\n<\/li>\n

          • \n

            Catted downpipes<\/strong> are more emissions-compliant and help reduce odor\/smell.<\/p>\n<\/li>\n

          • \n

            Designed for enthusiasts\u2014professional tuning recommended for full performance benefits.<\/p>\n<\/li>\n<\/ul>\n

            \n

            \ud83d\udd25 Upgrade your B58 platform with this 5\u201d Performance Downpipe<\/strong> and unleash deeper tone, more turbo sound, and noticeable power gains. Perfect for daily driving, spirited canyon runs, or full-blown track builds.<\/p>\n

            Fitment:<\/p>\n

            \u00a0<\/span>BMW G30 G20 G22 G32 B58 M240i M340i M440i 540i 640i 3.0T<\/h1>","protected":false},"excerpt":{"rendered":"

            Maximize your B58 engine’s performance potential with this 5\u201d high-flow exhaust downpipe, available in both Catted and Catless options. Engineered for enthusiasts who demand serious gains in power, throttle response, and exhaust sound, this downpipe is the perfect first step toward unlocking your turbocharged inline-6’s true potential. \ud83d\udd27 Product Features: Massive 5\u201d Diameter InletOversized 5-inch […]<\/p>\n","protected":false},"featured_media":16870,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[156],"product_cat":[124,119],"product_tag":[],"class_list":["post-2923","product","type-product","status-publish","has-post-thumbnail","product_brand-toyota","product_cat-exhaust-systems-tips","product_cat-toyota","pa_color-other-color","pa_make-toyota","pa_material-other-material","pa_vehicle-model-supra","first","instock","shipping-taxable","purchasable","product-type-variable"],"yoast_head":"\nB58 Exhaust 5in DownPipe Catted or Catless - BMW G20 \/ G29 M340i | RevexaAuto<\/title>\n<meta name=\"description\" content=\"Shop B58 Exhaust 5in DownPipe Catted or Catless - BMW G20 \/ G29 M340i\/ A90 Supra & More. 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