{"product_id":"kooks-universal-3in-center-center-oval-muffler-4x8x12","title":"Kooks KO300-12 3 in. Oval Weld On Muffler 12 in. Body T304 Stainless Steel","description":"\u003ch4\u003eT304 Stainless Oval Muffler Built for Weld In Performance Exhaust Fabrication\u003c\/h4\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eKO300-12\u003c\/strong\u003e is a 3 inch oval weld on muffler with a 12 inch body length, constructed from T304 stainless steel for long term durability in high performance exhaust systems. The oval body profile of this muffler is a key advantage for custom exhaust fabrication on vehicles where ground clearance, undercarriage packaging, or spare tire well access makes a round muffler body impractical. Oval mufflers deliver the same flow capacity and noise reduction as round equivalents at a reduced vertical height, opening up routing possibilities that would otherwise require routing around obstacles or elevating the exhaust system unacceptably.\u003c\/p\u003e\n\n\u003cp\u003eKooks builds the \u003cstrong\u003eKO300-12\u003c\/strong\u003e with the same T304 stainless used across their header and exhaust product line, ensuring the muffler holds up to the thermal and chemical exposure of a performance exhaust environment without rusting or deteriorating. The 3 inch inlet and outlet keep full tube diameter through the muffler for unrestricted flow, and the weld on construction creates a permanent, leak free installation when paired with clean TIG welds. Whether you are building a complete custom exhaust or replacing a muffler in an existing 3 inch system, this muffler provides a quality Kooks option in a compact oval form factor.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e3 inch inlet and outlet for full diameter flow in 3 inch exhaust systems\u003c\/li\u003e\n  \u003cli\u003e12 inch body length for balanced noise reduction and flow\u003c\/li\u003e\n  \u003cli\u003eOval body profile for tight packaging and improved ground clearance\u003c\/li\u003e\n  \u003cli\u003eT304 stainless steel construction for corrosion resistance and longevity\u003c\/li\u003e\n  \u003cli\u003eWeld on installation for a clean, permanent exhaust system connection\u003c\/li\u003e\n  \u003cli\u003eSuitable for custom exhaust fabrication on performance vehicles\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x 3 inch oval weld on muffler with 12 inch body\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\u003eKO300-12\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 Shape\u003c\/td\u003e\n\u003ctd\u003eOval\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBody Length\u003c\/td\u003e\n\u003ctd\u003e12 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eT304 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInstallation Type\u003c\/td\u003e\n\u003ctd\u003eWeld On\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 muffler require?\u003c\/strong\u003e\u003cbr\u003e\nThis muffler has 3 inch inlet and outlet connections, designed for installation into 3 inch exhaust systems.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy choose an oval muffler over a round one?\u003c\/strong\u003e\u003cbr\u003e\nThe oval body shape provides a lower vertical profile than a round muffler of comparable volume. This is beneficial on vehicles where ground clearance is limited or where undercarriage packaging makes a full round body impractical.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow long is the muffler body?\u003c\/strong\u003e\u003cbr\u003e\nThe muffler body is 12 inches long. This length provides a good balance between muffler volume for sound attenuation and overall exhaust system length.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow is this muffler installed?\u003c\/strong\u003e\u003cbr\u003e\nThis is a weld on muffler. It is welded into position in the exhaust system by welding the inlet and outlet to adjacent 3 inch exhaust tubing.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat material is this muffler made from?\u003c\/strong\u003e\u003cbr\u003e\nThe body is T304 stainless steel, which provides excellent resistance to exhaust corrosion, road salt, and thermal fatigue.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use this muffler on a dual exhaust system?\u003c\/strong\u003e\u003cbr\u003e\nYes. For a dual exhaust layout, two mufflers would be used, one per side. Each is sold individually.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWill this muffler work with clamps instead of welding?\u003c\/strong\u003e\u003cbr\u003e\nThis muffler is designed and rated as a weld on component. While exhaust clamps can be used temporarily, welded connections provide a more permanent, leak free, and vibration resistant installation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow loud is this muffler?\u003c\/strong\u003e\u003cbr\u003e\nSound output depends on the rest of the exhaust system configuration, engine displacement, and vehicle. The 12 inch body provides moderate sound attenuation. Customers building quieter systems may prefer a longer body muffler.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs this muffler compatible with Kooks header systems?\u003c\/strong\u003e\u003cbr\u003e\nYes. This is a 3 inch universal muffler that integrates naturally with Kooks 3 inch header and exhaust systems.\u003c\/p\u003e\n\n\u003ch4\u003eInstallation Instructions\u003c\/h4\u003e\n\u003col\u003e\n  \u003cli\u003eAllow the exhaust system to cool completely before beginning fabrication work.\u003c\/li\u003e\n  \u003cli\u003eDetermine the mounting location, ensuring adequate clearance from the floor pan and other undercarriage components at the oval body height.\u003c\/li\u003e\n  \u003cli\u003eCut the exhaust tubing at the inlet and outlet positions, accounting for the 12 inch body length plus weld joint allowance.\u003c\/li\u003e\n  \u003cli\u003ePosition the muffler in the desired orientation, noting inlet and outlet flow direction.\u003c\/li\u003e\n  \u003cli\u003eCheck orientation to confirm the oval body clears all obstacles with the vehicle at ride height.\u003c\/li\u003e\n  \u003cli\u003eTack weld at multiple points before completing full circumference welds at inlet and outlet connections.\u003c\/li\u003e\n  \u003cli\u003eUse T304 compatible filler for TIG welding to match the muffler material.\u003c\/li\u003e\n  \u003cli\u003eInspect welds and check for exhaust leaks after the first startup.\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":39739891941455,"sku":"KSHKO300-12","price":108.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/kooks-ko30012-muffler_01.jpg?v=1764602062","url":"https:\/\/www.blackopsautoworks.com\/products\/kooks-universal-3in-center-center-oval-muffler-4x8x12","provider":"Black Ops Auto Works","version":"1.0","type":"link"}