{"product_id":"catalytic-converter-for-buick-lacrosse-2010-2011-3-6l-left-right","title":"Catalytic Converter for Buick LaCrosse (2010-2011) 3.6L Left \u0026 Right","description":"\u003ch2\u003eDirect-Fit Catalytic Converter Set for 2010-2011 Buick LaCrosse\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The direct-fit catalytic converter set replaces degraded factory emissions units on the 2010-2011 Buick LaCrosse 3.6L to clear diagnostic trouble codes, restore exhaust scavenging, and re-establish proper emissions control.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Buick LaCrosse Catalyst Degradation Problem\u003c\/h3\u003e\n\u003cp\u003eOn the \u003cstrong\u003eEpsilon II\u003c\/strong\u003e platform, factory converters paired to the direct-injected \u003cstrong\u003eLLT\u003c\/strong\u003e 3.6L V6 face severe thermal stress. The factory direct-injection system produces localized soot accumulation and high exhaust gas temperatures during prolonged combustion cycles. Over time, stock ceramic substrates suffer from washcoat sintering, micro-cracking, and chemical contamination. This leads to exhaust flow restrictions, excessive cylinder backpressure, sluggish throttle response, and persistent P0420 or P0430 efficiency codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered as a bolt-on replacement for both left and right banks, this assembly uses a robust stainless steel outer shell designed to withstand aggressive thermal cycling and road debris corrosion. Internally, a dense ceramic honeycomb monolith provides extensive surface area coated in precious metals to promote complete reduction of NOx, CO, and unburned hydrocarbons. Precision-machined OE-style flanges and integrated O2 sensor ports allow direct integration with factory hardware, restoring exhaust velocity without requiring custom pipe fabrication or tuning.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; margin-bottom: 20px;\"\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;\"\u003e2010-2011 Buick LaCrosse\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;\"\u003e3.6L LLT V6 \/ Epsilon II\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;\"\u003e280 hp \/ 259 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;\"\u003eEXL794758\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2010 Buick LaCrosse CX (3.6L V6 LLT)\u003c\/li\u003e\n  \u003cli\u003e2010 Buick LaCrosse CXL (3.6L V6 LLT)\u003c\/li\u003e\n  \u003cli\u003e2010 Buick LaCrosse CXS (3.6L V6 LLT)\u003c\/li\u003e\n  \u003cli\u003e2011 Buick LaCrosse CX (3.6L V6 LLT)\u003c\/li\u003e\n  \u003cli\u003e2011 Buick LaCrosse CXL (3.6L V6 LLT)\u003c\/li\u003e\n  \u003cli\u003e2011 Buick LaCrosse CXS (3.6L V6 LLT)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the Epsilon II LaCrosse?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2010-2011 Buick LaCrosse equipped with the \u003cstrong\u003eLLT\u003c\/strong\u003e 3.6L V6 engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this resolve P0420 and P0430 check engine lights?\u003c\/strong\u003e\u003cbr\u003e Yes, installing this assembly replaces degraded catalyst monoliths with fresh active substrate to clear standard catalyst efficiency fault codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Buick Reliability Standard\u003c\/h3\u003e\n\u003cp\u003eMaintaining balanced backpressure and efficient exhaust thermal management protects downstream components and preserves the smooth, quiet cabin dynamics expected from the \u003cstrong\u003eEpsilon II\u003c\/strong\u003e chassis, keeping the direct-injected powertrain running cleanly over long highway duty cycles.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50501133041912,"sku":"DS-EEV1KTY1Z","price":159.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-buick-lacrosse-2010-2011-3-6l-left-right-1.jpg?v=1789326269","url":"https:\/\/performancechiptuning.com\/fr\/products\/catalytic-converter-for-buick-lacrosse-2010-2011-3-6l-left-right","provider":"Performance Chip Tuning","version":"1.0","type":"link"}