{"product_id":"kooks-3in-h-o-green-cats-catalytic-converter","title":"Kooks 3in H.O. Green Cats Catalytic Converter","description":"\u003ch4\u003eEPA Certified High Output Catalytic Converter Built for Performance Exhaust Systems\u003c\/h4\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eGE-90150\u003c\/strong\u003e is a universal 3 inch high output GreenCats catalytic converter designed to flow freely in high performance exhaust builds while maintaining EPA certification for 49 state street use. Kooks engineered the \u003cstrong\u003eGE-90150\u003c\/strong\u003e with a T304 stainless steel body, platinum coated substrate, and furnace brazed end caps to deliver reliable emissions compliance without the flow restriction that plagues standard replacement catalytic converters. This is the cat that belongs downstream of long tube headers on performance builds where both street legality and power output matter.\u003c\/p\u003e\n\n\u003cp\u003eAt 3 inches inlet and outlet, this converter flows without stepping down tube diameter anywhere in the exhaust path. The high output substrate is formulated to handle elevated exhaust temperatures from modified engines and forced induction combinations. Kooks rates the GreenCats line to support builds well beyond factory power levels, and the T304 stainless construction resists corrosion and thermal fatigue over years of use. Whether you are building a full exhaust from scratch or replacing a failing cat on an existing performance system, this converter integrates directly into 3 inch pipe via standard weld connections.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eUniversal 3 inch inlet and outlet for wide compatibility\u003c\/li\u003e\n  \u003cli\u003eEPA certified for 49 state street use\u003c\/li\u003e\n  \u003cli\u003eHigh output GreenCats substrate rated for performance and forced induction applications\u003c\/li\u003e\n  \u003cli\u003eT304 stainless steel body construction\u003c\/li\u003e\n  \u003cli\u003ePlatinum coated substrate for efficient light off\u003c\/li\u003e\n  \u003cli\u003eFurnace brazed end caps for leak free sealing\u003c\/li\u003e\n  \u003cli\u003eCompatible with all Kooks 3 inch performance exhaust systems\u003c\/li\u003e\n  \u003cli\u003eNot for sale or use in California (not CARB certified)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x this converter universal 3 inch high output GreenCats catalytic converter\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n      \u003cth\u003eDetail\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePart Number (MPN)\u003c\/td\u003e\n\u003ctd\u003eGE-90150\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003eContact us for UPC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInlet Diameter\u003c\/td\u003e\n\u003ctd\u003e3 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutlet Diameter\u003c\/td\u003e\n\u003ctd\u003e3 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBody Material\u003c\/td\u003e\n\u003ctd\u003eT304 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSubstrate\u003c\/td\u003e\n\u003ctd\u003ePlatinum Coated High Output GreenCats\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eEPA Certified\u003c\/td\u003e\n\u003ctd\u003eYes, 49 state (not CARB)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCalifornia Legal\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConnection Type\u003c\/td\u003e\n\u003ctd\u003eUniversal Weld In\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eFrequently Asked Questions\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat pipe size does this converter require?\u003c\/strong\u003e\u003cbr\u003e\nThis converter uses a 3 inch inlet and 3 inch outlet. It is designed for installation in 3 inch exhaust systems via weld on connections at both ends.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs this converter street legal?\u003c\/strong\u003e\u003cbr\u003e\nThis converter is EPA certified for street use in 49 states. It is not CARB certified and cannot be sold or installed in California.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan this converter be used on forced induction builds?\u003c\/strong\u003e\u003cbr\u003e\nYes. The GreenCats high output substrate is rated to handle the elevated exhaust temperatures and increased flow demands of supercharged and turbocharged applications.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this converter require welding to install?\u003c\/strong\u003e\u003cbr\u003e\nYes. This is a universal weld in catalytic converter. A professional welder or exhaust fabricator should install it by welding the inlet and outlet to the surrounding exhaust pipes.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWill this converter trigger a check engine light?\u003c\/strong\u003e\u003cbr\u003e\nWhen properly installed in a correctly tuned vehicle, this converter should not trigger a check engine light. If you are installing it after long tube headers, a tune is recommended to manage downstream O2 sensor readings.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat is the body material of this converter?\u003c\/strong\u003e\u003cbr\u003e\nThe body of this converter is constructed from T304 stainless steel, which provides excellent corrosion resistance and long service life in high temperature exhaust environments.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use this cat with any brand of headers?\u003c\/strong\u003e\u003cbr\u003e\nYes. Because this converter is a universal weld in unit with standard 3 inch connections, it can be used in any 3 inch exhaust system regardless of header brand.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs this converter sold as a single unit or a pair?\u003c\/strong\u003e\u003cbr\u003e\nThis converter is sold as a single catalytic converter. For a dual exhaust V8 application, you would need to purchase two units.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow does the GreenCats substrate compare to an OEM replacement cat?\u003c\/strong\u003e\u003cbr\u003e\nThe GreenCats high output substrate flows significantly better than a stock replacement catalytic converter while still meeting EPA certification standards. It is designed for performance applications where flow is a priority alongside emissions compliance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat warranty is provided?\u003c\/strong\u003e\u003cbr\u003e\nKooks provides a limited warranty on this converter. Contact your Kooks authorized retailer for specific warranty terms applicable to this universal catalytic converter.\u003c\/p\u003e\n\n\u003ch4\u003eInstallation Instructions\u003c\/h4\u003e\n\u003cp\u003eThis converter is a universal weld in catalytic converter. Follow these general steps for proper installation:\u003c\/p\u003e\n\u003col\u003e\n  \u003cli\u003eAllow the vehicle exhaust system to cool completely before beginning work.\u003c\/li\u003e\n  \u003cli\u003ePosition this converter in the exhaust path in the desired location, observing proper flow direction (inlet toward the engine, outlet toward the rear).\u003c\/li\u003e\n  \u003cli\u003eEnsure adequate clearance from the vehicle floor pan, transmission tunnel, and any heat sensitive components.\u003c\/li\u003e\n  \u003cli\u003eTack weld the inlet and outlet connections to the surrounding exhaust tubing to confirm fitment and alignment before final welds.\u003c\/li\u003e\n  \u003cli\u003eComplete full circumference TIG or MIG welds at both the inlet and outlet joints using a filler compatible with T304 stainless steel.\u003c\/li\u003e\n  \u003cli\u003eInspect all welds for pinholes or gaps before returning the vehicle to service.\u003c\/li\u003e\n  \u003cli\u003eIf installing downstream of long tube headers, an ECU tune is strongly recommended to address O2 sensor fueling and to prevent check engine lights.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch4\u003eProp 65 Warning\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eWARNING:\u003c\/strong\u003e This product can expose you to chemicals including Chromium and Nickel, which are known to the State of California to cause cancer, birth defects or reproductive harm. For more information go to \u003ca href=\"https:\/\/www.p65warnings.ca.gov\" target=\"_blank\" rel=\"nofollow\"\u003ewww.P65Warnings.ca.gov\u003c\/a\u003e.\u003c\/p\u003e","brand":"Kooks Headers","offers":[{"title":"Default Title","offer_id":43805399908431,"sku":"KSHGE-90150","price":735.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/kooks-ge-90150-green-cat.jpg?v=1763591970","url":"https:\/\/www.blackopsautoworks.com\/products\/kooks-3in-h-o-green-cats-catalytic-converter","provider":"Black Ops Auto Works","version":"1.0","type":"link"}