{"product_id":"a90-a91-toyota-supra-auxiliary-split-fuel-system","title":"A90\/ A91 Toyota Supra Auxiliary Split Fuel System","description":"\u003ch2\u003eSpool Performance A90 \/ A91 Toyota Supra Auxiliary Fuel System\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eSpool Performance A90 \/ A91 Toyota Supra Auxiliary Fuel System\u003c\/strong\u003e is designed for Supra owners pushing beyond the limits of the factory fuel system who want a solution that’s properly engineered, easy to install, and built for long-term reliability.\u003c\/p\u003e\n\u003cp\u003eBuilt around the B58 platform used in the Supra, this system focuses on correct fuel architecture and real-world usability. Every component and layout choice was made to deliver stable, predictable fueling at higher power levels while maintaining clean OEM-level integration.\u003c\/p\u003e\n\u003ch3\u003eWhy a Properly Split DI + PI Fuel System Matters\u003c\/h3\u003e\n\u003cp\u003eAs power levels increase on the B58-powered Supra, fueling challenges typically come from \u003cstrong\u003esupplying direct injection (DI) and port injection (PI) from the same fuel feed\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eWhen DI and PI share a feed:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eThe pulsed nature of DI can introduce pressure fluctuations that disrupt fuel flow to the PI injectors\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePort injection requires boost-referenced fuel pressure to maintain consistent injector differential under load\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAt higher boost and airflow, maintaining precise and repeatable fueling becomes more difficult\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBy separating the DI and PI supply, each system operates independently and exactly as intended. The result is \u003cstrong\u003esmoother fuel delivery, improved consistency, and greater confidence as power increases\u003c\/strong\u003e—especially on higher-boost Supra setups.\u003c\/p\u003e\n\u003ch3\u003eDesigned to Install Cleanly on the Supra Platform\u003c\/h3\u003e\n\u003cp\u003eExtensive development went into making this system straightforward to install while retaining OEM functionality.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eThe OEM fuel pump top hat is retained using additional precision-machined aluminum fuel fittings that integrate directly into the factory top hat\u003c\/strong\u003e, eliminating the need for repinning or modifying factory wiring\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eA plug-and-play wiring harness is supplied for direct compatibility with the Reflex controller\u003c\/strong\u003e, simplifying installation and control\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe result is a clean, factory-like install that avoids unnecessary complexity.\u003c\/p\u003e\n\u003ch3\u003eScalable Pump and Control Options\u003c\/h3\u003e\n\u003cp\u003eThe system is designed to grow with your Supra build:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDual Walbro 450 fuel pumps included standard\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOptional Walbro 525 upgrades\u003c\/strong\u003e available for higher horsepower goals\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eChoice of:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eStandard relay configuration\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSolid-state relay option\u003c\/strong\u003e for full PWM pump control \u003cmeta charset=\"utf-8\"\u003eavailable for purchase separately. NOTE: 2 harnesses required per AFS Kit - Link to Harness: https:\/\/spoolperformance.com\/products\/spool-lpfp-pwm-activation-harness-bmw?_pos=1\u0026amp;_sid=2a7c2a7b8\u0026amp;_ss=r\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis flexibility allows the fuel system to scale as power levels increase without requiring a complete redesign later.\u003c\/p\u003e\n\u003ch3\u003eHigh-Quality Fuel Plumbing\u003c\/h3\u003e\n\u003cp\u003eAll fuel lines included in the kit feature \u003cstrong\u003etriple-layer PTFE construction\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eInner \u003cstrong\u003ePTFE core\u003c\/strong\u003e for full fuel and ethanol compatibility\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMiddle \u003cstrong\u003estainless steel reinforcement\u003c\/strong\u003e for pressure strength\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOuter \u003cstrong\u003enylon protective layer\u003c\/strong\u003e for abrasion resistance and durability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDesigned to handle aggressive fuels, high pressure, and the heat typical of high-performance Supra builds.\u003c\/p\u003e\n\u003ch3\u003eCompact, Purpose-Built Fuel Pressure Regulation\u003c\/h3\u003e\n\u003cp\u003eThe system includes Radium Engineering's FPR.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eBoost-referenced for accurate pressure control under load\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStable regulation at high flow rates\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompact design for clean engine bay packaging\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBuilt to withstand demanding conditions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBuilt for High-Power Supra Builds\u003c\/h3\u003e\n\u003cp\u003eWhether you’re building a strong street-driven Supra or a higher-power setup, the Spool Performance A90 \/ A91 Toyota Supra Auxiliary Fuel System delivers the fueling control and capacity needed to push the platform confidently.\u003c\/p\u003e\n\u003cp\u003eWith properly separated DI and PI supply, OEM-friendly integration using precision aluminum fittings, Reflex compatibility, high-quality plumbing, and scalable pump options, this system is engineered to perform reliably as your Supra build evolves.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIf you’re ready to take your Supra’s fueling to the next level with a system that’s thoughtfully engineered and easy to live with, this is the solution built to get you there.\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eToyota GR Supra\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eA90 Supra\u003c\/strong\u003e – 2020–2021\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e3.0 \/ 3.0 Premium (B58 inline-6)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2.0 (B48 inline-4)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eA91 Supra\u003c\/strong\u003e – 2022–2023\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e3.0 \/ 3.0 Premium (B58 inline-6)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2.0 (B48 inline-4)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Spool Performance","offers":[{"title":"Walbro 450 with check valves","offer_id":50416494182657,"sku":"SP-A9XAUXF450","price":1299.0,"currency_code":"USD","in_stock":true},{"title":"Walbro 525 with check valves","offer_id":50416494215425,"sku":"SP-A9XAUXF525","price":1599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0842\/4610\/2273\/files\/1_b8beda19-21f9-450e-91ac-1c8acbb1aa85.png?v=1790644732","url":"https:\/\/fphpro.com\/products\/a90-a91-toyota-supra-auxiliary-split-fuel-system","provider":"Flako performance house","version":"1.0","type":"link"}