{"product_id":"gfb-13-subaru-brz-13-scion-fr-s-lightweight-alternator-pulley","title":"Go Fast Bits Lightweight Alternator Pulley: Scion FR-S (13+), Subaru BRZ (13+) \u0026 Toyota 86 (13+)","description":"\u003ch3\u003eGo Fast Bits Lightweight Alternator Pulley\u003c\/h3\u003e\u003cp\u003e2013–Present Scion FR-S, Subaru BRZ, Toyota 86\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e2221\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Go Fast Bits Lightweight Alternator Pulley is a precision-engineered upgrade designed specifically for the 2013 and newer Scion FR-S, Subaru BRZ, and Toyota 86 models. This pulley reduces the rotating mass on the engine’s accessory drive system, delivering sharper throttle response and a more lively engine feel. Ideal for enthusiasts seeking improved acceleration and enhanced engine responsiveness without the need for additional modifications or tuning, this pulley offers a straightforward bolt-on performance enhancement.\u003c\/p\u003e\u003cp\u003eBy significantly lowering the rotational inertia, the engine revs more freely and feels more willing to accelerate, giving drivers a noticeable increase in \"urge\" during spirited driving. This lightweight pulley is a practical upgrade for anyone looking to extract more dynamic performance from their naturally aspirated boxer engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eEngineered for performance and reliability, the Go Fast Bits Lightweight Alternator Pulley offers the following key benefits:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eUp to 85% reduction in rotating inertia compared to the factory pulley\u003c\/li\u003e\n\u003cli\u003eSharper throttle response and improved engine \"urge\"\u003c\/li\u003e\n\u003cli\u003eEnhances acceleration without requiring supporting modifications or ECU tuning\u003c\/li\u003e\n\u003cli\u003eMaintains full accessory drive functionality with no negative impact on alternator or belt-driven components\u003c\/li\u003e\n\u003cli\u003ePrecision CNC machined from a single billet of 6061-T6 aluminum for superior strength and durability\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on fitment for 2013 and newer Scion FR-S, Subaru BRZ, and Toyota 86 models\u003c\/li\u003e\n\u003cli\u003eDoes not cause engine damage or compromise reliability\u003c\/li\u003e\n\u003cli\u003eLightweight design contributes to overall engine efficiency and responsiveness\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Lightweight Alternator Pulley is crafted from a solid billet of 6061-T6 aluminum, a material known for its excellent strength-to-weight ratio and corrosion resistance. Using advanced CNC machining techniques, Go Fast Bits achieves exacting tolerances to ensure a perfect fit and smooth operation. The pulley’s reduced mass lowers the rotational inertia on the engine’s accessory belt system, allowing the engine to rev more freely and respond more quickly to throttle inputs.\u003c\/p\u003e\u003cp\u003eThis high-quality construction ensures long-lasting durability under demanding driving conditions while maintaining the integrity of the factory accessory drive system. The pulley’s design balances lightweight performance gains with the robustness required for daily driving and spirited use.\u003c\/p\u003e\u003cp\u003ePerformance \u0026amp; Sound\u003c\/p\u003e\u003cp\u003eBy reducing the rotating mass on the alternator pulley, this upgrade allows the engine to accelerate more rapidly through the RPM range, resulting in a more responsive and lively driving experience. Drivers will notice a crisper throttle feel and a more willing engine that revs with less effort. While the pulley does not directly alter exhaust sound, the improved engine responsiveness can enhance the overall driving sensation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eInstallation of the Go Fast Bits Lightweight Alternator Pulley is straightforward and designed to be a direct replacement for the factory pulley on 2013 and newer Scion FR-S, Subaru BRZ, and Toyota 86 models. No additional modifications, tuning, or supporting parts are required. The pulley installs using standard hand tools and can typically be completed in under an hour by a competent enthusiast or professional mechanic.\u003c\/p\u003e\u003cp\u003eBecause the pulley maintains the factory accessory drive geometry and belt routing, there are no adverse effects on alternator performance or accessory operation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eOne Go Fast Bits Lightweight Alternator Pulley (6061-T6 billet aluminum)\u003c\/li\u003e\n\u003cli\u003eInstallation instructions\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis lightweight alternator pulley is ideal for owners of the Scion FR-S, Subaru BRZ, and Toyota 86 who want to improve throttle response and engine liveliness without extensive modifications. It suits enthusiasts looking for a simple, reliable, and effective bolt-on upgrade to enhance daily driving and spirited road use. Perfect for naturally aspirated setups and compatible with stock or lightly modified engines.\u003c\/p\u003e","brand":"Go Fast Bits","offers":[{"title":"Default Title","offer_id":51076252238120,"sku":"2221","price":61.11,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0717\/9744\/0808\/files\/0000059_680d9efe219a9ea3e90dd6d7d7bf7940_10f31408-ff86-4742-8072-b3be165441aa.webp?v=1771647090","url":"https:\/\/fastscions.com\/products\/gfb-13-subaru-brz-13-scion-fr-s-lightweight-alternator-pulley","provider":"FastScions","version":"1.0","type":"link"}