{"product_id":"bmw-b58-gen-2-g-series-m340i-m440i-m240i-catless-downpipe-with-heat-shield","title":"BMW B58 Gen 2 G-Series M340i\/M440i\/M240i Catless\/Catted Downpipe With Heat Shield","description":"\u003ch2\u003eBMW B58 Gen 2 G-Series M340i\/M440i\/M240i Catless\/Catted Downpipe with Heat Shield\u003c\/h2\u003e\n\u003cp\u003eUnlock the full performance potential of your BMW B58TU-powered G-Series platform with these Catless or High-Flow Catted Downpipes featuring integrated thermal heat shielding — engineered to maximise exhaust flow, improve turbocharger efficiency, and unleash the true sound of BMW's legendary turbocharged inline-six.\u003c\/p\u003e\n\u003cp\u003eDesigned specifically for the B58 Gen 2 (B58TU) engine, these high-flow downpipes replace the restrictive factory catalytic converter, significantly reducing exhaust backpressure and allowing the turbocharger to spool faster and operate more efficiently. Available in both Catless and High-Flow Catted configurations, these downpipes deliver improved throttle response, increased power potential, enhanced turbo acoustics, and a noticeably more aggressive exhaust note.\u003c\/p\u003e\n\u003cp\u003eConstructed from premium 304 stainless steel and wrapped in high-temperature thermal heat shielding, these downpipes help reduce engine bay temperatures while protecting surrounding components from excessive radiant heat. Precision TIG welding and mandrel-bent construction ensure exceptional durability and long-term reliability under demanding performance conditions.\u003c\/p\u003e\n\u003cp\u003eWhether paired with the factory exhaust system or a complete aftermarket setup, these downpipes provide one of the most effective performance upgrades available for the B58TU platform.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003ch3\u003eCatless or High-Flow Catted Configurations\u003c\/h3\u003e\n\u003cp\u003eAvailable in either Catless form for maximum exhaust flow and performance, or with a high-flow catalytic converter for a more emissions-friendly setup and refined sound characteristics.\u003c\/p\u003e\n\u003ch3\u003eIntegrated Thermal Heat Shielding\u003c\/h3\u003e\n\u003cp\u003eHelps reduce radiant heat and protects surrounding engine bay components from excessive temperatures.\u003c\/p\u003e\n\u003ch3\u003ePremium 304 Stainless Steel Construction\u003c\/h3\u003e\n\u003cp\u003eManufactured from corrosion-resistant stainless steel for exceptional durability and heat resistance.\u003c\/p\u003e\n\u003ch3\u003eImproved Turbo Efficiency\u003c\/h3\u003e\n\u003cp\u003eReduced exhaust backpressure allows the turbocharger to spool faster and operate more efficiently.\u003c\/p\u003e\n\u003ch3\u003eMandrel-Bent Tubing\u003c\/h3\u003e\n\u003cp\u003eMaintains unrestricted exhaust flow and consistent pipe diameter throughout the system.\u003c\/p\u003e\n\u003ch3\u003ePrecision TIG Welded\u003c\/h3\u003e\n\u003cp\u003eStrong, clean welds engineered to withstand extreme temperatures and demanding performance applications.\u003c\/p\u003e\n\u003ch3\u003eDirect Bolt-On Fitment\u003c\/h3\u003e\n\u003cp\u003eDesigned specifically for BMW B58 Gen 2 (B58TU) G-Series vehicles using factory mounting locations.\u003c\/p\u003e\n\u003ch2\u003ePerformance Benefits (When Tuned)\u003c\/h2\u003e\n\u003cp\u003e• Increased horsepower and torque potential\u003cbr\u003e• Faster turbo spool and improved throttle response\u003cbr\u003e• Reduced exhaust backpressure\u003cbr\u003e• Enhanced turbocharger efficiency\u003cbr\u003e• Increased turbo whistle and induction acoustics\u003cbr\u003e• More aggressive exhaust note\u003cbr\u003e• Ideal foundation for Stage 1, Stage 2, and higher-performance builds\u003c\/p\u003e\n\u003cp\u003ePerformance gains may vary depending on ECU calibration, fuel quality, and supporting modifications.\u003c\/p\u003e\n\u003ch2\u003eSound Characteristics\u003c\/h2\u003e\n\u003ch3\u003eCatless Version\u003c\/h3\u003e\n\u003cp\u003e• Deeper and more aggressive exhaust tone\u003cbr\u003e• Increased turbo spool and whistle acoustics\u003cbr\u003e• Louder cold starts\u003cbr\u003e• Enhanced pops and burbles (when tuned)\u003cbr\u003e• Maximum exhaust flow and sound\u003c\/p\u003e\n\u003ch3\u003eHigh-Flow Catted Version\u003c\/h3\u003e\n\u003cp\u003e• Sportier and more refined exhaust note\u003cbr\u003e• Increased turbo spool acoustics\u003cbr\u003e• Improved exhaust volume without excessive harshness\u003cbr\u003e• Excellent balance between performance and everyday drivability\u003c\/p\u003e\n\u003ch2\u003eVehicle Fitment\u003c\/h2\u003e\n\u003cp\u003eBMW G20\/G21 M340i xDrive (2019+)\u003cbr\u003eBMW G22\/G23\/G26 M440i xDrive (2021+)\u003cbr\u003eBMW G42 M240i xDrive (2022+)\u003cbr\u003eBMW G29 Z4 M40i (2019+)\u003c\/p\u003e\n\u003cp\u003e3.0L Turbocharged B58 Gen 2 (B58TU) Engine\u003c\/p\u003e\n\u003ch2\u003ePlease Note\u003c\/h2\u003e\n\u003cp\u003eProfessional installation is strongly recommended.\u003c\/p\u003e\n\u003cp\u003ePerformance gains will vary depending on vehicle condition, fuel quality, ECU calibration, and supporting modifications.\u003c\/p\u003e\n\u003cp\u003eThe Catless version is intended for off-road and motorsport use only.\u003c\/p\u003e\n\u003cp\u003eVehicles equipped with OPF\/GPF emissions systems may require alternative configurations.\u003c\/p\u003e\n\u003ch2\u003eWhy Choose Proven Performance Parts\u003c\/h2\u003e\n\u003cp\u003eWe specialise in high-performance parts for European vehicles — including Volkswagen GTI \u0026amp; R models, Audi S\/RS platforms, and BMW M vehicles. Every product we offer is carefully selected for its quality, fitment, and real-world performance — tested by enthusiasts, for enthusiasts.\u003c\/p\u003e","brand":"Proven Performance Parts","offers":[{"title":"BMW G20\/G21 M340i xDrive (2019+) \/ Catless Downpipe With Heat Shield","offer_id":52373368602906,"sku":null,"price":650.0,"currency_code":"AUD","in_stock":true},{"title":"BMW G20\/G21 M340i xDrive (2019+) \/ Catted Downpipe With Heat Shield","offer_id":52373373223194,"sku":null,"price":700.0,"currency_code":"AUD","in_stock":true},{"title":"BMW G22\/G23\/G26 M440i xDrive (2021+) \/ Catless Downpipe With Heat Shield","offer_id":52373368635674,"sku":null,"price":650.0,"currency_code":"AUD","in_stock":true},{"title":"BMW G22\/G23\/G26 M440i xDrive (2021+) \/ Catted Downpipe With Heat Shield","offer_id":52373373255962,"sku":null,"price":700.0,"currency_code":"AUD","in_stock":true},{"title":"BMW G42 M240i xDrive (2022+) \/ Catless Downpipe With Heat Shield","offer_id":52373368668442,"sku":null,"price":650.0,"currency_code":"AUD","in_stock":true},{"title":"BMW G42 M240i xDrive (2022+) \/ Catted Downpipe With Heat Shield","offer_id":52373373288730,"sku":null,"price":700.0,"currency_code":"AUD","in_stock":true},{"title":"BMW G29 Z4 M40i (2019+) \/ Catless Downpipe With Heat Shield","offer_id":52373368701210,"sku":null,"price":650.0,"currency_code":"AUD","in_stock":true},{"title":"BMW G29 Z4 M40i (2019+) \/ Catted Downpipe With Heat Shield","offer_id":52373373321498,"sku":null,"price":700.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0951\/1177\/4490\/files\/ShopifyPOST2_6.png?v=1781852728","url":"https:\/\/provenperformanceparts.com.au\/products\/bmw-b58-gen-2-g-series-m340i-m440i-m240i-catless-downpipe-with-heat-shield","provider":"Proven Performance Parts","version":"1.0","type":"link"}