{"product_id":"tomei-fuel-pressure-regulator-type-l-large-diaphragm","title":"Tomei Fuel Pressure Regulator Type L - Large Diaphragm (Universal)","description":"\u003ch3\u003eTomei Fuel Pressure Regulator Type L - Large Diaphragm (Universal)\u003c\/h3\u003e\u003cp\u003eAchieve precise fuel pressure control with the \u003cstrong\u003eTomei Type L Fuel Pressure Regulator\u003c\/strong\u003e. Featuring a large diaphragm design for improved response and stability, this premium regulator delivers 1:1 rising rate fuel pressure control with adjustable range from 30-80 PSI.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e⚠️ IMPORTANT COMPATIBILITY NOTE:\u003c\/strong\u003e This regulator is NOT compatible with E85 ethanol fuel. For gasoline use only.\u003c\/p\u003e\u003ch4\u003eKey Features:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eLarge diaphragm design for improved response and stability\u003c\/li\u003e\n\u003cli\u003e1:1 rising rate fuel pressure control\u003c\/li\u003e\n\u003cli\u003eAdjustable fuel pressure: 30-80 PSI (2.1-5.6 kg\/cm²)\u003c\/li\u003e\n\u003cli\u003e-6AN inlet and outlet ports for universal fitment\u003c\/li\u003e\n\u003cli\u003e-6AN vacuum\/boost reference port\u003c\/li\u003e\n\u003cli\u003eHigh-quality construction for reliability\u003c\/li\u003e\n\u003cli\u003eUniversal application - works with any fuel system\u003c\/li\u003e\n\u003cli\u003eTomei quality engineering and manufacturing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003ePerformance Benefits:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge Diaphragm:\u003c\/strong\u003e Better response and more stable fuel pressure control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1:1 Rising Rate:\u003c\/strong\u003e Fuel pressure increases proportionally with boost pressure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide Adjustment Range:\u003c\/strong\u003e 30-80 PSI covers most applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Fitment:\u003c\/strong\u003e -6AN ports work with any fuel system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Performance:\u003c\/strong\u003e Maintains proper air\/fuel ratio under boost\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReliable Operation:\u003c\/strong\u003e Tomei quality ensures consistent performance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecifications:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Tomei Powered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e TB507A-0000B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct:\u003c\/strong\u003e Fuel Pressure Regulator Type L\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiaphragm:\u003c\/strong\u003e Large diaphragm design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRising Rate:\u003c\/strong\u003e 1:1 (fuel pressure increases 1 PSI per 1 PSI of boost)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Range:\u003c\/strong\u003e 30-80 PSI (2.1-5.6 kg\/cm²)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Port:\u003c\/strong\u003e -6AN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Port:\u003c\/strong\u003e -6AN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReturn Port:\u003c\/strong\u003e -6AN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVacuum\/Boost Reference:\u003c\/strong\u003e -6AN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Compatibility:\u003c\/strong\u003e Gasoline only (NOT compatible with E85)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Universal (any fuel system)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFitment Information:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Application:\u003c\/strong\u003e Works with any vehicle and fuel system\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCommon Uses:\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eTurbocharged engines requiring rising rate fuel pressure\u003c\/li\u003e\n\u003cli\u003eSupercharged engines needing boost-referenced fuel control\u003c\/li\u003e\n\u003cli\u003eHigh-performance naturally aspirated builds\u003c\/li\u003e\n\u003cli\u003eAftermarket fuel system upgrades\u003c\/li\u003e\n\u003cli\u003eStandalone ECU installations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e⚠️ IMPORTANT:\u003c\/strong\u003e NOT compatible with E85 ethanol fuel - gasoline use only\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e Requires -6AN fuel lines and fittings for installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eWhat's Included:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTomei Type L fuel pressure regulator\u003c\/li\u003e\n\u003cli\u003eMounting bracket\u003c\/li\u003e\n\u003cli\u003eInstallation instructions\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eInstallation Notes:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eProfessional installation recommended\u003c\/li\u003e\n\u003cli\u003eRequires -6AN fuel lines and fittings (sold separately)\u003c\/li\u003e\n\u003cli\u003eMust be installed in fuel return line\u003c\/li\u003e\n\u003cli\u003eVacuum\/boost reference line required for proper operation\u003c\/li\u003e\n\u003cli\u003eSet base fuel pressure with engine at idle (vacuum applied)\u003c\/li\u003e\n\u003cli\u003eVerify fuel pressure under boost before aggressive driving\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eUse with gasoline only - NOT compatible with E85\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eLarge Diaphragm Design:\u003c\/h4\u003e\u003cp\u003eThe Type L features a large diaphragm design that provides improved response and more stable fuel pressure control compared to smaller diaphragm regulators. The larger diaphragm surface area allows for more precise control and better response to rapid changes in boost pressure, making it ideal for turbocharged and supercharged applications.\u003c\/p\u003e\u003ch4\u003e1:1 Rising Rate Fuel Pressure Control:\u003c\/h4\u003e\u003cp\u003eThe Type L provides 1:1 rising rate fuel pressure control, meaning fuel pressure increases 1 PSI for every 1 PSI of boost pressure. This maintains proper fuel pressure differential across the injectors under boost, ensuring the correct air\/fuel ratio is maintained. The 1:1 ratio is the most common and effective for most turbocharged applications.\u003c\/p\u003e\u003ch4\u003eAdjustable 30-80 PSI:\u003c\/h4\u003e\u003cp\u003eThe wide adjustment range of 30-80 PSI (2.1-5.6 kg\/cm²) covers most applications from mild street builds to aggressive race setups. The adjustment is made via the top-mounted adjustment screw, allowing you to fine-tune fuel pressure to match your injector size and fuel system requirements.\u003c\/p\u003e\u003ch4\u003e-6AN Ports for Universal Fitment:\u003c\/h4\u003e\u003cp\u003eAll ports on the Type L are -6AN (AN6), which is the most common size for aftermarket fuel systems. The -6AN sizing provides excellent flow capacity while being compatible with widely available fuel lines and fittings. The regulator features inlet, outlet, return, and vacuum\/boost reference ports.\u003c\/p\u003e\u003ch4\u003eE85 Incompatibility:\u003c\/h4\u003e\u003cp\u003eThis fuel pressure regulator is NOT compatible with E85 ethanol fuel or other ethanol-based fuels. The internal components are designed for gasoline use only and may be damaged by the corrosive properties of ethanol-based fuels. If you are running E85 or plan to run E85 in the future, you must use an E85-compatible fuel pressure regulator. Using this regulator with E85 will void the warranty and may result in fuel system failure.\u003c\/p\u003e\u003ch4\u003eHow It Works:\u003c\/h4\u003e\u003cp\u003eThe fuel pressure regulator is installed in the fuel return line between the fuel rail and fuel tank. The vacuum\/boost reference port is connected to the intake manifold. Under vacuum (idle\/cruise), the regulator maintains base fuel pressure (typically 40-45 PSI). Under boost, the regulator increases fuel pressure proportionally (1:1 ratio) to maintain proper fuel pressure differential across the injectors.\u003c\/p\u003e\u003ch4\u003eWhy Tomei?\u003c\/h4\u003e\u003cp\u003eTomei Powered has been manufacturing high-performance parts for Japanese vehicles for over 50 years. Their fuel pressure regulators are trusted by professional tuners and racers worldwide for reliable, precise fuel pressure control. Every Tomei product is engineered and manufactured to the highest standards.\u003c\/p\u003e\u003ch4\u003eInstallation Tips:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eInstall in fuel return line after fuel rail\u003c\/li\u003e\n\u003cli\u003eMount regulator with ports facing down to prevent air bubbles\u003c\/li\u003e\n\u003cli\u003eConnect vacuum\/boost reference to intake manifold\u003c\/li\u003e\n\u003cli\u003eUse quality -6AN fuel lines and fittings\u003c\/li\u003e\n\u003cli\u003eSet base pressure to 40-45 PSI at idle (with vacuum applied)\u003c\/li\u003e\n\u003cli\u003eVerify 1:1 rising rate under boost with fuel pressure gauge\u003c\/li\u003e\n\u003cli\u003eCheck for leaks before starting engine\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003ePerfect For:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTurbocharged engines requiring rising rate fuel control (gasoline only)\u003c\/li\u003e\n\u003cli\u003eSupercharged builds needing boost-referenced regulation\u003c\/li\u003e\n\u003cli\u003eAftermarket fuel system upgrades\u003c\/li\u003e\n\u003cli\u003eStandalone ECU installations\u003c\/li\u003e\n\u003cli\u003eAnyone seeking reliable Tomei quality\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003ePerfect For:\u003c\/strong\u003e Turbocharged and supercharged gasoline builds requiring precise 1:1 rising rate fuel pressure control with Tomei's proven large diaphragm design.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e Set base fuel pressure at idle with vacuum applied, then verify 1:1 rising rate under boost with a fuel pressure gauge.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e⚠️ IMPORTANT:\u003c\/strong\u003e NOT compatible with E85 ethanol fuel - gasoline use only. Universal fitment with -6AN ports.\u003c\/p\u003e\u003cp\u003eAchieve precise fuel control with Tomei Type L - large diaphragm, 1:1 rising rate, 30-80 PSI adjustable, -6AN ports, gasoline only.\u003c\/p\u003e","brand":"Tomei","offers":[{"title":"Default Title","offer_id":42453585297575,"sku":"TB507A-0000B","price":172.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/8344\/1063\/products\/115311058145b42d216bdfb8.jpg?v=1653073737","url":"https:\/\/www.straightsiximports.com\/en-us\/products\/tomei-fuel-pressure-regulator-type-l-large-diaphragm","provider":"Straight Six Imports","version":"1.0","type":"link"}