{"product_id":"high-flow-ss304-mirror-polished-exhaust-downpipe-with-flex-mesh-for-bmw-m340i-g20-z4-g29-supra-b58-3-0t","title":"Mirror-Polished SS304 High-Flow Downpipe for BMW M340i G20\/Z4 G29\/Toyota Supra A90 B58 3.0L Turbo","description":"\u003cdiv\u003e\u003ch3\u003eDESCRIPTION\u003c\/h3\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cdiv\u003e\u003cstrong\u003eCut Exhaust Backpressure \u0026amp; Enhance Turbo Power Delivery for BMW B58 3.0L Turbo.\u003c\/strong\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv\u003eThis mirror‑polished SS304 high‑flow downpipe removes OEM exhaust restrictions to deliver improved turbo spool and deep aggressive exhaust tone. Built‑in woven flex mesh absorbs thermal expansion and engine vibration to eliminate pipe fatigue cracking. Pre‑tapped OEM‑standard sensor bungs retain factory sensor hardware. CNC‑machined sealing flanges support direct bolt‑on installation, all mounting hardware supplied with 1‑year warranty.\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003ch3\u003eVEHICLE FITMENT\u003c\/h3\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMW 3 Series M340i G20 \u003c\/strong\u003e— All Years (3.0L B58 Turbo Engine)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMW Z4 G29\u003c\/strong\u003e — All Years (3.0L B58 Turbo Engine)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eToyota Supra A90\u003c\/strong\u003e — All Years (3.0L B58 Turbo Engine)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003ch3\u003eKEY FEATURES\u003c\/h3\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy‑Duty SS304 Stainless Steel with Mirror Polished Surface\u003c\/strong\u003e: Anti‑corrosion and heat resistant for long street \u0026amp; track use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized High‑Flow Internal Pipe Geometry\u003c\/strong\u003e: Reduce exhaust backpressure to boost turbo response and sport exhaust acoustics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt‑In Woven Flex Mesh Joint\u003c\/strong\u003e: Absorb thermal expansion and vibration stress to prevent pipe cracking under heavy load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre‑Tapped OEM‑Spec O2 Sensor Bungs\u003c\/strong\u003e: Perfectly accommodate stock oxygen sensors for plug‑and‑play assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC Precision Machined Sealing Flanges\u003c\/strong\u003e: Flat seamless contact surface to fully prevent exhaust leakage after fitment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100% OEM Direct Bolt‑On Fitment\u003c\/strong\u003e: Chassis‑scanned design without cutting or modification, 1‑year quality warranty included.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003ch3\u003eTECH SPECIFICATIONS\u003c\/h3\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Thick High Grade SS304 Stainless Steel with Mirror Polished Surface\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Type\u003c\/strong\u003e: High‑Flow Performance Exhaust Downpipe\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWelding Process\u003c\/strong\u003e: Handcrafted Full TIG Seamless Air‑Tight Welding\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment Type\u003c\/strong\u003e: OEM Direct Bolt‑On Replacement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Engine\u003c\/strong\u003e: 3.0L B58 Turbo\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003ch3\u003eWHAT'S IN THE BOX\u003c\/h3\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cul\u003e\n\u003cli\u003e1 x Mirror Polished SS304 High‑Flow Downpipe\u003c\/li\u003e\n\u003cli\u003eFull Set OEM Matching Installation Bolt Hardware Kit\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e","brand":"Wanmax Racing","offers":[{"title":"Default Title","offer_id":55102169022836,"sku":"WMR-BMW-M340I-G20-Z4-G29-SUPRA-A90-B58-30T-SS304-DP","price":250.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0990\/7244\/2740\/files\/H9df494e271fb4909a30c8e47f9840739c_1.jpg?v=1786086397","url":"https:\/\/wanmaxracing.com\/products\/high-flow-ss304-mirror-polished-exhaust-downpipe-with-flex-mesh-for-bmw-m340i-g20-z4-g29-supra-b58-3-0t","provider":"Wanmax Racing","version":"1.0","type":"link"}