{"product_id":"performance-catted-downpipes-for-mercedes-benz-e-class-e63-e63s-w213-2017-2021-4-0l","title":"Performance Catted Downpipes for Mercedes Benz E-Class E63 E63S W213 (2017-2021) 4.0L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Flow Performance Catted Downpipes for 2017-2021 Mercedes Benz E-Class (W213)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Performance Catted Downpipes replace the dense, restrictive factory catalytic converters on the 2017-2021 Mercedes Benz E-Class to reduce exhaust backpressure, lower exhaust gas temperatures (EGTs), and accelerate turbo spool.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Mercedes Benz E-Class Exhaust Flow Restriction\u003c\/h3\u003e\n\u003cp\u003eFrom the factory, the \u003cstrong\u003eW213\u003c\/strong\u003e AMG platform utilizes tightly packed, high-cell-density ceramic catalytic converters mounted directly downstream of the \"hot-V\" twin turbos. This OEM configuration creates significant thermal buildup and excessive exhaust backpressure against the turbine wheels. The resulting restriction impedes scavenging efficiency, raises operating temperatures under sustained load, and delays transient boost response, limiting the true potential of the twin-turbocharged V8 platform.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered for maximum flow velocity and thermal management, these high-flow catted downpipes are constructed from premium, mandrel-bent stainless steel to eliminate internal turbulence and resist extreme heat cycling. High-flow catalytic converter cores dramatically decrease backpressure while preserving catalytic operation, bridging the gap between factory restriction and catless configurations. Precision TIG-welded joints and CNC-machined flanges guarantee structural integrity and exact alignment with OEM turbo housings, substantially reducing turbo lag, dropping underhood temperatures, and enhancing exhaust acoustic clarity.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x pair stainless high-flow catted turbo downpipes\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: 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;\"\u003e2017-2021 Mercedes Benz E-Class\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;\"\u003e\n\u003cstrong\u003eM177\u003c\/strong\u003e 4.0L Biturbo \/ \u003cstrong\u003eW213\u003c\/strong\u003e\n\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;\"\u003e603 hp \/ 627 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;\"\u003eN\/A\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\u003e2017-2021 Mercedes Benz E-Class E63 (W213) 4.0L M177\u003c\/li\u003e\n  \u003cli\u003e2017-2021 Mercedes Benz E-Class E63S (W213) 4.0L M177\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 W213 E-Class?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2017-2021 Mercedes Benz E-Class equipped with the \u003cstrong\u003eM177\u003c\/strong\u003e 4.0L biturbo engine; it does not fit non-M177 or non-W213 chassis vehicles.\u003c\/p\u003e\n\n\u003ch4\u003eIs an ECU recalibration required after installing these downpipes?\u003c\/h4\u003e\n\u003cp\u003eWhile designed as a direct bolt-on replacement, an ECU tune is strongly recommended to optimize air-fuel ratios and prevent post-cat oxygen sensor efficiency codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Mercedes Benz Precision Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to meet the stringent demands of modern European performance motoring, these downpipes deliver precision fitment and elevated gas scavenging without sacrificing structural durability under aggressive thermal cycles.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67558921470200,"sku":"DS-ETECRVQOZ","price":815.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/performance-catted-downpipes-for-mercedes-benz-e-class-e63-e63s-w213-2017-2021-4-0l-1.jpg?v=1790926454","url":"https:\/\/performancechiptuning.com\/de\/products\/performance-catted-downpipes-for-mercedes-benz-e-class-e63-e63s-w213-2017-2021-4-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}