{"product_id":"yonristic-bmw-z4-m40i-g29-performance-exhaust-system","title":"Yonristic BMW Z4 M40i G29 Performance Exhaust System","description":"\u003ch2 data-start=\"196\" data-end=\"291\"\u003e\u003cstrong data-start=\"199\" data-end=\"291\"\u003eBMW Z4 M40i (B58) Performance Exhaust System — 3.5” Midpipe + Dual 2.75” Quad-Tip Design\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-start=\"293\" data-end=\"849\"\u003eThe BMW Z4 M40i delivers one of the most rewarding B58 driving experiences, but its factory exhaust setup leaves a lot of performance and emotion on the table. The stock system relies on a narrow mid-section and restrictive merging points, bottlenecking exhaust flow and muting the signature B58 tone that enthusiasts crave. Our redesigned system unleashes the engine’s true character with a dramatic increase in flow, a deeper and more aggressive sound profile, and improved responsiveness—especially for tuned vehicles or cars running upgraded downpipes.\u003c\/p\u003e\n\u003cp data-start=\"851\" data-end=\"1316\"\u003eAt the core of this system is a \u003cstrong data-start=\"883\" data-end=\"918\"\u003efull 3.5-inch high-flow midpipe\u003c\/strong\u003e, engineered to eliminate factory choke points and significantly reduce backpressure. This oversized midpipe transitions into \u003cstrong data-start=\"1044\" data-end=\"1108\"\u003edual 2.75-inch pipes through a precision casting Y-collector\u003c\/strong\u003e, ensuring perfectly smooth exhaust gas distribution without turbulence. The result is a cleaner, more unified exhaust note with enhanced turbo spool and sharper throttle response across the entire RPM range.\u003c\/p\u003e\n\u003cp data-start=\"1318\" data-end=\"1791\"\u003eTo complete the transformation, we developed a \u003cstrong data-start=\"1365\" data-end=\"1395\"\u003etrue quad-tip rear section\u003c\/strong\u003e, replacing the factory’s faux-quad appearance with an actual dual-branch layout. This not only sharpens the Z4’s rear aesthetics but also improves acoustic separation between the exhaust banks, giving the B58 a more exotic, performance-oriented tone. The system integrates seamlessly with the OEM valve control for daily comfort yet becomes noticeably more aggressive and expressive when opened.\u003c\/p\u003e\n\u003cp data-start=\"1793\" data-end=\"2020\"\u003eBuilt for performance today and headroom for future mods, this exhaust is ideal for owners planning ECU tunes, high-flow downpipes, or upgraded turbos—ensuring maximum efficiency without introducing drone or unwanted harshness.\u003c\/p\u003e\n\u003cp data-start=\"1793\" data-end=\"2020\"\u003e \u003c\/p\u003e\n\u003ch1 data-start=\"1249\" data-end=\"1278\"\u003e\u003cstrong data-start=\"1253\" data-end=\"1278\"\u003eKey Specifications\u003c\/strong\u003e\u003c\/h1\u003e\n\u003ch3 data-start=\"1280\" data-end=\"1295\"\u003e\u003cstrong data-start=\"1284\" data-end=\"1295\"\u003eFitment\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1296\" data-end=\"1380\"\u003e\n\u003cli data-start=\"1296\" data-end=\"1340\"\u003e\n\u003cp data-start=\"1298\" data-end=\"1340\"\u003e\u003cstrong data-start=\"1298\" data-end=\"1319\"\u003eBMW Z4 M40i (G29)\u003c\/strong\u003e — \u003cstrong data-start=\"1322\" data-end=\"1338\"\u003e2019–Present\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1341\" data-end=\"1380\"\u003e\n\u003cp data-start=\"1343\" data-end=\"1380\"\u003eB58 3.0L Turbocharged Inline-6 Engine\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1382\" data-end=\"1403\"\u003e\u003cstrong data-start=\"1386\" data-end=\"1403\"\u003eConfiguration\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1404\" data-end=\"1632\"\u003e\n\u003cli data-start=\"1404\" data-end=\"1494\"\u003e\n\u003cp data-start=\"1406\" data-end=\"1494\"\u003e\u003cstrong data-start=\"1406\" data-end=\"1429\"\u003e3.5” single midpipe\u003c\/strong\u003e → \u003cstrong data-start=\"1432\" data-end=\"1462\"\u003eprecision-cast Y-collector\u003c\/strong\u003e → \u003cstrong data-start=\"1465\" data-end=\"1492\"\u003edual 2.75” rear section\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1495\" data-end=\"1557\"\u003e\n\u003cp data-start=\"1497\" data-end=\"1557\"\u003eTrue quad-exit design\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1634\" data-end=\"1651\"\u003e\u003cstrong data-start=\"1638\" data-end=\"1651\"\u003eMaterials\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1652\" data-end=\"1778\"\u003e\n\u003cli data-start=\"1652\" data-end=\"1695\"\u003e\n\u003cp data-start=\"1654\" data-end=\"1695\"\u003e\u003cstrong data-start=\"1654\" data-end=\"1682\"\u003eAISI 304 Stainless Steel\u003c\/strong\u003e (standard)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1696\" data-end=\"1778\"\u003e\n\u003cp data-start=\"1698\" data-end=\"1778\"\u003e\u003cstrong data-start=\"1698\" data-end=\"1733\"\u003e6AL-4V Aerospace-Grade Titanium\u003c\/strong\u003e (optional; 55–60% lighter, more exotic tone)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1780\" data-end=\"1801\"\u003e\u003cstrong data-start=\"1784\" data-end=\"1801\"\u003eManufacturing\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1802\" data-end=\"1917\"\u003e\n\u003cli data-start=\"1802\" data-end=\"1830\"\u003e\n\u003cp data-start=\"1804\" data-end=\"1830\"\u003eCAD-modeled \u0026amp; 3D scanned\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1831\" data-end=\"1854\"\u003e\n\u003cp data-start=\"1833\" data-end=\"1854\"\u003eMandrel-bent tubing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1855\" data-end=\"1886\"\u003e\n\u003cp data-start=\"1857\" data-end=\"1886\"\u003ePrecision casting collector\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1887\" data-end=\"1917\"\u003e\n\u003cp data-start=\"1889\" data-end=\"1917\"\u003eHand TIG-welded construction\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1919\" data-end=\"1938\"\u003e\u003cstrong data-start=\"1923\" data-end=\"1938\"\u003eTip Options\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1939\" data-end=\"2033\"\u003e\n\u003cli data-start=\"1939\" data-end=\"1966\"\u003e\n\u003cp data-start=\"1941\" data-end=\"1966\"\u003eReal \u003cstrong data-start=\"1946\" data-end=\"1964\"\u003equad 4” tips\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1967\" data-end=\"2033\"\u003e\n\u003cp data-start=\"1969\" data-end=\"2033\"\u003eFinishes: \u003cstrong data-start=\"1979\" data-end=\"2033\"\u003eChrome \/ Burnt \/ Satin Black \/ Forged Carbon Fiber\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"2035\" data-end=\"2056\"\u003e\u003cstrong data-start=\"2039\" data-end=\"2056\"\u003eValve Control\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"2057\" data-end=\"2141\"\u003e\n\u003cli data-start=\"2057\" data-end=\"2089\"\u003e\n\u003cp data-start=\"2059\" data-end=\"2089\"\u003eFull OEM valve compatibility\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2090\" data-end=\"2141\"\u003e\n\u003cp data-start=\"2092\" data-end=\"2141\"\u003eOptional \u003cstrong data-start=\"2101\" data-end=\"2132\"\u003eremote-control valve module\u003c\/strong\u003e included\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-end=\"2914\" data-start=\"2894\"\u003e\u003cstrong data-end=\"2914\" data-start=\"2898\"\u003eInstallation\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-end=\"3035\" data-start=\"2915\"\u003e\n\u003cli data-end=\"2933\" data-start=\"2915\"\u003e\n\u003cp data-end=\"2933\" data-start=\"2917\"\u003eDirect bolt-on\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2948\" data-start=\"2934\"\u003e\n\u003cp data-end=\"2948\" data-start=\"2936\"\u003eNo cutting\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2987\" data-start=\"2949\"\u003e\n\u003cp data-end=\"2987\" data-start=\"2951\"\u003eFactory valve motor transfers over\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yonristic Performance","offers":[{"title":"Catback Exhaust System \/ AISI304 Stainless Steel \/ (4) Chrome","offer_id":47585850294410,"sku":"sku-42209711554631","price":2299.0,"currency_code":"USD","in_stock":true},{"title":"Catback Exhaust System \/ AISI304 Stainless Steel \/ (4) Black","offer_id":47585850327178,"sku":"sku-42209711587399","price":2299.0,"currency_code":"USD","in_stock":true},{"title":"Catback Exhaust System \/ AISI304 Stainless Steel \/ (4) Burnt","offer_id":47585850359946,"sku":"sku-42209711620167","price":2299.0,"currency_code":"USD","in_stock":true},{"title":"Catback Exhaust System \/ AISI304 Stainless Steel \/ (4) Carbon Fiber","offer_id":47585850392714,"sku":"sku-42209711652935","price":2299.0,"currency_code":"USD","in_stock":true},{"title":"Catback Exhaust System \/ Ti-6Al-4V Titanium \/ (4) 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Fiber","offer_id":47585851048074,"sku":"sku-42209712472135","price":3599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0625\/5548\/8394\/files\/473.jpg?v=1768840692","url":"https:\/\/pistontwistin.org\/products\/yonristic-bmw-z4-m40i-g29-performance-exhaust-system","provider":"Piston Twistin LLC","version":"1.0","type":"link"}