{"product_id":"grimmspeed-lightweight-crank-pulley-black-for-subaru-fa-fb-engines-equipped-w-1-piece-oem-pulley","title":"GrimmSpeed Lightweight Crank Pulley Black For Subaru FA\/FB Engines Equipped w\/1-Piece OEM Pulley","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eProven Performance. Your factory crank pulley is responsible for transferring energy from your crankshaft to your water pump, a\/c compressor and alternator. It does this by way of a rubber belt and it does it's job well.\u003c\/p\u003e\n\u003cp\u003eThe drawback to the factory pulley is that it's quite heavy. Reasons for this include less expensive manufacturing and using the pulley's mass to smooth out 'noise' in the accessory system (NOT to be confused with functioning as a harmonic dampener, which it does Not ).\u003c\/p\u003e\n\u003cp\u003eThe GrimmSpeed Lightweight Crank Pulley Reduces the rotational mass of the system, allowing your engine to accelerate and decelerate the rotating assembly more quickly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuick Specs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e75 Percent Reduction in Rotating Mass - weighs 1. 1lb vs the 4. 4lb OEM pulley\u003c\/li\u003e\n\u003cli\u003eMachined 6061 T6 Aluminum - high quality, precision construction\u003c\/li\u003e\n\u003cli\u003eHard Anodized Finish - ensures a durable finish and resists corrosion\u003c\/li\u003e\n\u003cli\u003eRemoval Tool Mounting - allows the use of the GrimmSpeed Crank Pulley Tool Factory\u003c\/li\u003e\n\u003cli\u003eFitment - direct replacement for easy Installation Design\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Design process for this pulley ensured that a perfect factory replacement Fitment was maintained while performance was maximized. It's a common misconception that the mass of a crank pulley alone determines its effectiveness.\u003c\/p\u003e\n\u003cp\u003eThe truth is that it's actually the moment of inertia that affects the pulley's ability to improve engine and throttle response. The moment of inertia, in non-engineering terms, is a function of Not only the mass of an object, but how that mass is distributed about it's rotational axis. A lower moment of inertia means that less torque is required to spin the crank pulley and, in turn, the crankshaft\/engine.\u003c\/p\u003e\n\u003cp\u003eOur engineers took great care to keep the already minimal mass as close to the center of the pulley as possible without sacrificing its strength. The result is a pulley that fits well, looks beautiful and works exactly as intended.\u003c\/p\u003e\n\u003cp\u003eFrom the first test drive, you'll Not ice smoother operation, faster response and a more enjoyable drive. Much of this is difficult to quantify, but you can see from the datalogs below that when compared to the OEM pulley, the GrimmSpeed Crank Pulley quantitatively improved throttle response.\u003c\/p\u003e\n\u003cp\u003eAnother major improvement made is that you'll find the necessary threaded holes to use our Crank Pulley Removal Tool for safe and easy Installation and removal. On newer vehicles, cars can simply be put into a high gear to break the crank pulley bolt loose, but as with older chassis vehicles, this bolt will likely become quite stubborn with time.\u003c\/p\u003e\n\u003cp\u003eThe use of the GrimmSpeed Removal Tool will make removal quick and easy. Materials Like any GrimmSpeed product, these pulleys are built to last.\u003c\/p\u003e\n\u003cp\u003eUsing locally sourced 6061 T6 aluminum billet, the pulleys are machined and Measured to verify critical dimensions before being anodized. The bright dip anodizing process that we use ensures a durable finish that will protect the pulley from corrosion. Lastly, each pulley is laser etched with a sharp GrimmSpeed logo.\u003c\/p\u003e\n\u003cp\u003ePerformanceProven performance from a crank pulley can be difficult to quantify, but when you're pulley is meticulously Engineered, the results are there. Below is a chart showing the free revving of a stock BRZ equipped with a stock pulley and then a GrimmSpeed pulley.\u003c\/p\u003e\n\u003cp\u003eIt's easy to see that the engine reaches Redline faster and drops to idle faster with the GrimmSpeed Lightweight Crank Pulley Installed. That's improved throttle response that you'll appreciate immediately.\u003c\/p\u003e\n\u003cp\u003e Fitment 15-18 Subaru WRX 2019-21 Subaru WRX (Requires additional GrimmSpeed Crank Hub) 2013 Subaru BRZ  2013 Toyota FRS\/86 \u003c\/p\u003e\n\u003ch2\u003eAdditional Description\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eLimited Lifetime\u003c\/li\u003e\n\u003cli\u003eBlack\u003c\/li\u003e\n\u003cli\u003eCALIFORNIA WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GrimmSpeed","offers":[{"title":"Default Title","offer_id":44831379292358,"sku":"GRM095023","price":149.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0081\/0804\/8420\/files\/095023-JBCB_06a05c6c-01a0-4218-9cbb-6632b9fb16a6.jpg?v=1755872296","url":"https:\/\/www.graveyardperformance.com\/products\/grimmspeed-lightweight-crank-pulley-black-for-subaru-fa-fb-engines-equipped-w-1-piece-oem-pulley","provider":"Graveyard Performance","version":"1.0","type":"link"}