{"product_id":"cat-back-exhaust-for-jeep-liberty-2002-2007-2-4l-2-8l-3-7l","title":"Cat Back Exhaust for Jeep Liberty (2002-2007) 2.4L 2.8L 3.7L","description":"\u003ch2\u003eHigh-Flow Cat Back Exhaust for 2002-2007 Jeep Liberty\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Cat Back Exhaust replaces the restrictive OEM factory piping and chambered muffler on the 2002-2007 Liberty to minimize backpressure, reduce thermal load, and optimize exhaust scavenging.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Jeep Liberty Flow Restriction and Corrosion Weakness\u003c\/h3\u003e\n\u003cp\u003eThe factory exhaust on the \u003cstrong\u003eJeep Liberty KJ\u003c\/strong\u003e platform relies on restrictive, press-bent aluminized steel tubing routed through a heavily baffled, chambered muffler. Over time, thermal cycling and moisture trap corrosive condensation inside the casing, accelerating seam rot and internal baffle failure. Additionally, the tight, crush-bent radiuses over the rear solid axle pinch exhaust velocity. This creates parasitic backpressure that spikes exhaust gas temperatures (EGTs) on the \u003cstrong\u003e2.8L CRD\u003c\/strong\u003e turbo-diesel and restricts volumetric efficiency across the rev range on \u003cstrong\u003e2.4L\u003c\/strong\u003e and \u003cstrong\u003e3.7L PowerTech\u003c\/strong\u003e gasoline powerplants under sustained towing or off-road loads.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eFabricated using mandrel-bent high-grade stainless steel tubing, this direct-fit system maintains a uniform internal diameter to eliminate flow turbulence and promote rapid gas evacuation. The straight-through, perforated-core performance muffler utilizes high-density acoustic absorption packing to lower exhaust backpressure while controlling cab drone. Robotically TIG-welded joints and thick-gauge mounting flanges ensure leak-free integrity, mating directly to the factory catalytic converter flange. Heavy-duty solid steel hanger prongs align with factory rubber isolators to withstand severe driveline oscillation and off-road vibration.\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;\"\u003e2002-2007 Jeep Liberty\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\u003ePowerTech\u003c\/strong\u003e, \u003cstrong\u003eVM Motori R 428\u003c\/strong\u003e \/ \u003cstrong\u003eKJ\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;\"\u003e150-210 hp \/ 165-295 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\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2002-2005 Jeep Liberty Sport \/ Renegade 2.4L I4 (KJ)\u003c\/li\u003e\n  \u003cli\u003e2005-2006 Jeep Liberty Sport \/ Limited 2.8L CRD Turbo Diesel (KJ)\u003c\/li\u003e\n  \u003cli\u003e2002-2007 Jeep Liberty Sport \/ Limited \/ Renegade 3.7L V6 (KJ)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the KJ Liberty?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2002-2007 Jeep Liberty equipped with the \u003cstrong\u003e2.4L\u003c\/strong\u003e, \u003cstrong\u003e2.8L CRD\u003c\/strong\u003e, or \u003cstrong\u003e3.7L PowerTech\u003c\/strong\u003e engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this cat-back system trigger a Check Engine Light (CEL)?\u003c\/strong\u003e\u003cbr\u003e No, because this system bolts directly downstream of the factory catalytic converter and secondary O2 sensors, OEM closed-loop fueling and emissions monitoring remain unaffected.\u003c\/p\u003e\n\n\u003ch3\u003eThe Jeep Durability Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered for harsh off-camber terrain and heavy cargo demands, this system provides rugged clearance and corrosion resistance built to endure salt-laden winter roads and high-duty off-road heat cycles without structural compromise.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50622421532920,"sku":"DS-E1F5ZYZ76","price":186.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/cat-back-exhaust-for-jeep-liberty-2002-2007-2-4l-2-8l-3-7l-1.jpg?v=1790264864","url":"https:\/\/performancechiptuning.com\/products\/cat-back-exhaust-for-jeep-liberty-2002-2007-2-4l-2-8l-3-7l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}