{"product_id":"catalytic-converter-for-chevrolet-astro-1996-1999-4-3l","title":"Catalytic Converter for Chevrolet Astro (1996-1999) 4.3L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Stainless Catalytic Converter for 1996-1999 Chevrolet Astro (M-Body)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The catalytic converter replaces clogged or degraded emissions hardware on the 1996-1999 Astro to clear catalyst efficiency DTCs and re-establish factory exhaust flow velocity.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Chevrolet Astro Catalyst Degradation\u003c\/h3\u003e\n\u003cp\u003eOn high-mileage \u003cstrong\u003eGM M-Body\u003c\/strong\u003e vans powered by the \u003cstrong\u003eVortec 4300 L35\u003c\/strong\u003e, the factory ceramic monolith faces thermal fatigue, carbon contamination from rich fuel trims, and internal substrate washcoat sintering over decades of duty cycles. This degradation triggers persistent P0420\/P0430 Diagnostic Trouble Codes, creates backpressure bottlenecks that choke top-end torque during heavy payload hauling, and causes foul sulfur emissions when exhaust gas conversion efficiency collapses.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered as a direct-fit emissions solution, this replacement unit features a high-grade 409 stainless steel housing designed to withstand extreme thermal expansion without structural warping or seam blowout. Inside, an advanced ceramic honeycomb monolith coated with washcoat precious metals delivers efficient catalytic chemical conversion of hydrocarbons, carbon monoxide, and NOx. Precision-machined, original-equipment-spec thick flanges mate seamlessly to factory downpipes and intermediate exhaust sections, incorporating direct O2 sensor bungs to restore baseline fuel-trim signals without custom fabrication or TIG welding.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Direct-fit catalytic converter\u003c\/li\u003e\n  \u003cli\u003eExhaust gasket\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100% style=\" border-collapse: collapse border: solid font-size: min-width:\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;\"\u003e1996-1999 Chevrolet Astro\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;\"\u003e4.3L Vortec L35 \/ GM M-Body\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;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e190 hp \/ 250 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e50293\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1996 Chevrolet Astro Base, LS, LT 4.3L V6\u003c\/li\u003e\n  \u003cli\u003e1997 Chevrolet Astro Base, LS, LT 4.3L V6\u003c\/li\u003e\n  \u003cli\u003e1998 Chevrolet Astro Base, LS, LT 4.3L V6\u003c\/li\u003e\n  \u003cli\u003e1999 Chevrolet Astro Base, LS, LT 4.3L V6\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the M-Body Astro?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1996-1999 Chevrolet Astro equipped with the \u003cstrong\u003eVortec 4300 L35\u003c\/strong\u003e engine. \u003cstrong\u003eNon-compliant for shipment or installation in California, Colorado, New York, or Maine.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eDoes this converter require cutting or welding during installation?\u003c\/h4\u003e\n\u003cp\u003eNo, this unit features direct-fit OE-style flanges and integrated O2 sensor bungs designed to bolt straight up to the factory exhaust system using standard hand tools.\u003c\/p\u003e\n\n\u003ch3\u003eThe Chevrolet Fleet Durability Standard\u003c\/h3\u003e\n\u003cp\u003eThe Astro's truck-based ladder frame and Vortec powertrain were designed for relentless payload demands and heavy towing; this converter restores the engine's original volumetric breathing balance and thermal efficiency so your drivetrain delivers dependable pulling power without catalytic restrictions.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67901830463736,"sku":"DS-EYHY97FEN","price":205.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-chevrolet-astro-1996-1999-4-3l-1.jpg?v=1793341188","url":"https:\/\/performancechiptuning.com\/products\/catalytic-converter-for-chevrolet-astro-1996-1999-4-3l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}