{"product_id":"porter-muffler-13-freedom-flow-exhaust-resonator","title":"Porter Muffler 13\" Freedom Flow Exhaust Resonator","description":"\u003cp\u003eThe \u003cb\u003ePorter Muffler 13\" Freedom Flow Exhaust Resonator\u003c\/b\u003e is a heavy-duty, compact exhaust resonator engineered for vehicle owners who want the unrestricted volume and aggression of a straight-pipe exhaust system while eliminating harsh, high-frequency \"tinny\" rasps and drone. Built using the same steel-packed core design as Porter's classic mufflers, it allows the engine's true exhaust note to resonate clearly without choking exhaust gas velocity.\u003c\/p\u003e\n\u003ch3\u003eProduct Overview \u0026amp; Internal Acoustic Engineering\u003c\/h3\u003e\n\u003cp\u003eStraight-pipe exhaust systems frequently suffer from irritating high-pitch metal harmonics, rasp, and severe interior cabin drone. Traditional glass-packed resonators quickly burn out their internal fiberglass under intense exhaust heat, leading to deteriorated sound quality.\u003c\/p\u003e\n\u003cp\u003eThe Freedom Flow resonator addresses this by pairing an internal \u003cb\u003esteel spiral core\u003c\/b\u003e with \u003cb\u003eblow-proof, high-density stainless steel wool packing\u003c\/b\u003e. As exhaust gases pass through the central chamber, high-frequency rasp and harsh acoustic spikes are absorbed by the steel packing, leaving a clean, deep, un-muffled V8 or high-output engine tone without restricting flow.\u003c\/p\u003e\n\u003ch3\u003eHeavy-Duty Structural Construction\u003c\/h3\u003e\n\u003cp\u003eEngineered for extreme exhaust temperatures and high-horsepower applications, the Freedom Flow resonator utilizes an ultra-rugged structural design:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003e16-Gauge Seamless Body:\u003c\/b\u003e Features a heavy-duty 7.00\" outer diameter seamless steel outer casing to withstand road impacts and thermal stress.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003e12-Gauge Welded End Caps:\u003c\/b\u003e Extra-thick 12-gauge steel end caps are fully welded to the casing to prevent blown end seams or leaks under severe exhaust backpressure backfires.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eBlow-Proof Stainless Steel Packing:\u003c\/b\u003e Internal steel packing will not degrade, melt, or blow out over time, guaranteeing consistent sound tuning.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Features \u0026amp; Design Highlights\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eStraight-Pipe Volume with Clean Tone:\u003c\/b\u003e Eliminates harsh \"tinny\" pipe harmonics and rasp while maintaining maximum straight-pipe exhaust volume.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003e100% Blow-Proof Stainless Steel Packing:\u003c\/b\u003e Will not burn out, dry out, or degrade under extreme exhaust gas temperatures.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eUltra-Heavy-Duty Steel Construction:\u003c\/b\u003e Built with a 16-gauge seamless 7\" body and 12-gauge steel end plates.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSteel Spiral Core Architecture:\u003c\/b\u003e Dissipates high-frequency acoustic spikes without restricting exhaust gas velocity or horsepower.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eReversible Non-Directional Flow:\u003c\/b\u003e Symmetrical internal construction allows mounting in either flow direction.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eAmerican-Made Quality:\u003c\/b\u003e Hand-crafted in the USA using U.S.-sourced steel products.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specification Matrix\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFeature \/ Metric\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eTechnical Specification Detail\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eManufacturer\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003ePorter Mufflers\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eProduct Line\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eFreedom Flow Exhaust Resonator\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eOverall Length\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e13.00 Inches\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eOuter Casing Diameter\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e7.00 Inches (Seamless Round Body)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eCasing Thickness\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eHeavy-Duty 16-Gauge Seamless Steel\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eEnd Cap Thickness\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e12-Gauge Welded Steel\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eInternal Construction\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSteel Spiral Core with High-Density Stainless Steel Wool Packing\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003ePrimary Function\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eEliminates straight-pipe rasp and harmonics without reducing volume\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eCountry of Manufacture\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eHandmade in the USA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eInstallation \u0026amp; System Placement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003ePlacement in Exhaust System:\u003c\/b\u003e For maximum effectiveness at cancelling high-frequency rasp and drone, install the Freedom Flow resonators as close to the header\/manifold collectors or mid-pipe crossover (H-pipe\/X-pipe) as space allows.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eFull Seam Welding:\u003c\/b\u003e Sized for a slip-fit lap joint over standard exhaust tubing. Fully seam-welding the slip joints to the exhaust pipe is strongly recommended over band clamps to ensure a permanent, leak-free seal.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Porter Mufflers","offers":[{"title":"1.75\" \/ Blue Ceramic Painted Steel","offer_id":52877312884868,"sku":"POR PM351757","price":109.95,"currency_code":"USD","in_stock":true},{"title":"1.75\" \/ Polished Stainless Steel","offer_id":52877312917636,"sku":"POR SSPM1351757","price":164.95,"currency_code":"USD","in_stock":true},{"title":"2\" \/ Blue Ceramic Painted Steel","offer_id":52877312950404,"sku":"POR PM352007","price":109.95,"currency_code":"USD","in_stock":true},{"title":"2\" \/ Polished Stainless Steel","offer_id":52877312983172,"sku":"POR SSPM352007","price":164.95,"currency_code":"USD","in_stock":true},{"title":"2.25\" \/ Blue Ceramic Painted Steel","offer_id":52877313015940,"sku":"POR PM402257","price":109.95,"currency_code":"USD","in_stock":true},{"title":"2.25\" \/ Polished Stainless Steel","offer_id":52877313048708,"sku":"POR SSPM402257","price":164.95,"currency_code":"USD","in_stock":true},{"title":"2.5\" \/ Blue Ceramic Painted Steel","offer_id":52877313081476,"sku":"POR PM402507","price":109.95,"currency_code":"USD","in_stock":true},{"title":"2.5\" \/ Polished Stainless Steel","offer_id":52877313114244,"sku":"POR SSPM402507","price":164.95,"currency_code":"USD","in_stock":true},{"title":"3\" \/ Blue Ceramic Painted Steel","offer_id":52877313147012,"sku":"POR PM403007","price":109.95,"currency_code":"USD","in_stock":true},{"title":"3\" \/ Polished Stainless Steel","offer_id":52877313179780,"sku":"POR SSPM403007","price":164.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0286\/1180\/5316\/files\/FreedomFlowResonatorComparedtoOur.webp?v=1790113855","url":"https:\/\/hotrodhardware.com\/products\/porter-muffler-13-freedom-flow-exhaust-resonator","provider":"Hot Rod Hardware","version":"1.0","type":"link"}