{"product_id":"catalytic-converter-for-saturn-astra-2008-2009-1-8l","title":"Catalytic Converter for Saturn Astra (2008-2009) 1.8L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Manifold Catalytic Converter for 2008-2009 Saturn Astra (Astra H)\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This direct-fit manifold catalytic converter bolts directly to the 2008-2009 Saturn Astra (\u003cstrong\u003eAstra H\u003c\/strong\u003e) \u003cstrong\u003eZ18XER 1.8L\u003c\/strong\u003e cylinder head to oxidize HC and CO, reduce NOx emissions, and restore factory exhaust flow.\u003c\/p\u003e\u003ch3\u003eThe Stock Saturn Astra Manifold Converter Failure\u003c\/h3\u003e\u003cp\u003eOn the \u003cstrong\u003eAstra H\u003c\/strong\u003e equipped with the \u003cstrong\u003eZ18XER 1.8L I4\u003c\/strong\u003e, the factory converter sits directly against the cylinder head exhaust ports. Intense thermal cycling and exhaust heat soak fracture the OEM ceramic substrate and degrade its precious-metal washcoat over time. When catalyst efficiency drops below ECU thresholds, the ECM triggers \u003cstrong\u003eP0420\/P0430\u003c\/strong\u003e diagnostic trouble codes. Dislodged monolith fragments also rattle inside the housing and choke exhaust flow under load.\u003c\/p\u003e\u003ch4\u003eCommon Symptoms of a Failing OEM Manifold Catalytic Converter\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck Engine Light \/ DTCs:\u003c\/strong\u003e Persistent \u003cstrong\u003eP0420\/P0430\u003c\/strong\u003e codes triggered by diminished catalyst oxygen storage capacity across the degraded core.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMetallic Substrate Rattle:\u003c\/strong\u003e Audible rattling from the front exhaust bay caused by fractured ceramic honeycomb chunks vibrating inside the manifold shell.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust Restriction \u0026amp; Failed Emissions:\u003c\/strong\u003e Elevated backpressure from collapsed substrate cells, causing sluggish acceleration and failed \u003cstrong\u003eOBD-II\u003c\/strong\u003e emissions inspections.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Direct-Fit Stainless Exhaust Solution\u003c\/h3\u003e\u003cp\u003eEngineered as a direct bolt-on replacement (Part #\u003cstrong\u003e16657\u003c\/strong\u003e), this integrated manifold converter pairs a corrosion-resistant stainless steel body and tubular runners with precision-welded OEM-style cylinder head and outlet flanges. Inside the 8-inch by 5-inch canister, a high-flow ceramic honeycomb substrate coated with a precious-metal washcoat restores proper HC, CO, and NOx conversion for \u003cstrong\u003eOBD-II\u003c\/strong\u003e compliance. The assembly retains factory heat shield mounting brackets and the pre-catalyst \u003cstrong\u003eO2 sensor port\u003c\/strong\u003e, allowing clean installation without cutting or welding.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e1 x Manifold Catalytic Converter\u003c\/li\u003e\n\u003cli\u003e1 x Manifold Gasket\u003c\/li\u003e\n\u003cli\u003e1 x Outlet Flange Gasket\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2008-2009 Saturn Astra\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eZ18XER 1.8L I4 \/ Astra H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEmissions \u0026amp; Substrate\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eEPA Federal (46-State Legal) \/ Ceramic Honeycomb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eInstallation Type\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eDirect Bolt-On OEM Replacement (No Cutting or Welding)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2008-2009 Saturn Astra XE 1.8L I4 (3-Door \u0026amp; 5-Door)\u003c\/li\u003e\n\u003cli\u003e2008-2009 Saturn Astra XR 1.8L I4 (3-Door \u0026amp; 5-Door)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\u003ch4\u003eDoes this fit the Astra H Saturn Astra?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e This is a direct fit for 2008-2009 Saturn Astra XE and XR models (3-door and 5-door) equipped with the \u003cstrong\u003eZ18XER 1.8L I4\u003c\/strong\u003e engine. \u003cstrong\u003eThis EPA Federal converter is not CARB approved and is not legal for vehicles registered in California, New York, Colorado, or Maine.\u003c\/strong\u003e\u003c\/p\u003e\u003ch4\u003eWill this clear P0420\/P0430 codes, and are O2 sensors included?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes for degraded converters, and no O2 sensors are included.\u003c\/strong\u003e Transfer existing O2 sensors or install new units, and check for upstream exhaust leaks to resolve \u003cstrong\u003eP0420\/P0430\u003c\/strong\u003e fault codes.\u003c\/p\u003e\u003ch4\u003eAre gaskets and mounting hardware included for installation?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes, both the manifold gasket and outlet flange gasket are included.\u003c\/strong\u003e Let the exhaust cool completely, soak fasteners with penetrating oil, transfer the heat shield, and torque fasteners evenly to prevent flange leaks.\u003c\/p\u003e\u003ch3\u003eThe Saturn Precision Standard\u003c\/h3\u003e\u003cp\u003eBuilt to match OEM flange geometry and thermal tolerances on the \u003cstrong\u003eAstra H\u003c\/strong\u003e platform, this converter restores \u003cstrong\u003eOBD-II\u003c\/strong\u003e catalyst readiness and quiet exhaust operation. Compare with your original unit before installation for reliable, CEL-free driving.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68089969901816,"sku":"DS-ET0W90CWX","price":221.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-saturn-astra-2008-2009-1-8l-1.jpg?v=1794585137","url":"https:\/\/performancechiptuning.com\/fr\/products\/catalytic-converter-for-saturn-astra-2008-2009-1-8l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}