{"product_id":"cobb-lightweight-crank-pulley-subaru-impreza-2-5-gt-2009-2010-black-300102","title":"COBB Lightweight Crank Pulley Subaru Impreza 2.5 GT (2009-2010) Black - 300102","description":"\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003cb\u003eFitment Information\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSubaru Impreza 2.5 GT (2009, 2010) \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eSpecs \u0026amp; Features\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb data-index-in-node=\"0\" data-path-to-node=\"3,0,0\"\u003eFeatherweight Fighter:\u003c\/b\u003e Precision CNC machined from \u003cb data-index-in-node=\"51\" data-path-to-node=\"3,0,0\"\u003eBillet 6061-T6 Aluminum\u003c\/b\u003e, weighing in at a mere \u003cb data-index-in-node=\"98\" data-path-to-node=\"3,0,0\"\u003e1.2 lbs\u003c\/b\u003e—that is a \u003cb data-index-in-node=\"116\" data-path-to-node=\"3,0,0\"\u003e4lb weight reduction\u003c\/b\u003e over stock!\u003c\/li\u003e\n\u003cli\u003e\n\u003cb data-index-in-node=\"0\" data-path-to-node=\"3,1,0\"\u003eNo \"Under-Drive\" Headaches:\u003c\/b\u003e Engineered to maintain the exact \u003cb data-index-in-node=\"61\" data-path-to-node=\"3,1,0\"\u003eStock Diameter\u003c\/b\u003e, ensuring your alternator, A\/C, and power steering keep running at factory speeds without triggering electrical warning lights.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb data-index-in-node=\"0\" data-path-to-node=\"3,2,0\"\u003ePhysics Upgrade:\u003c\/b\u003e drastically reduces \u003cb data-index-in-node=\"37\" data-path-to-node=\"3,2,0\"\u003eRotational Mass\u003c\/b\u003e, meaning your engine wastes less energy spinning the pulley and puts more energy into the wheels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb data-index-in-node=\"0\" data-path-to-node=\"3,3,0\"\u003eBuilt to Survive:\u003c\/b\u003e Finished in a hard \u003cb data-index-in-node=\"37\" data-path-to-node=\"3,3,0\"\u003eAnodized Black\u003c\/b\u003e to withstand engine bay heat, corrosion, and grime while looking stealthy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb data-index-in-node=\"0\" data-path-to-node=\"3,4,0\"\u003eSimple Install:\u003c\/b\u003e Matches the factory drive belt surface perfectly, making this a quick, bolt-on upgrade for even the novice mechanic.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cb\u003e\u003c\/b\u003e\u003cstrong\u003eProduct Description\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"5\"\u003eLet’s talk physics for a second: \"Rotational Mass\" is the enemy of performance. Think of it like trying to spin a heavy steel bicycle wheel versus a lightweight carbon fiber one. The heavy one takes way more energy to get moving. The factory main pulley on your engine is a heavy, cast-iron lump that acts like a parasite, stealing horsepower just to keep itself spinning. \u003cb data-index-in-node=\"373\" data-path-to-node=\"5\"\u003eCOBB Tuning\u003c\/b\u003e solves this by putting your crankshaft on a crash diet. By swapping to a CAD-designed, CNC-machined \u003cb data-index-in-node=\"485\" data-path-to-node=\"5\"\u003e6061-T6 Billet Aluminum\u003c\/b\u003e pulley, you are dropping over \u003cb data-index-in-node=\"539\" data-path-to-node=\"5\"\u003e4 pounds\u003c\/b\u003e of dead weight off the nose of the crank.\u003c\/p\u003e\n\u003cp data-path-to-node=\"6\"\u003eThe result? The moment you touch the gas, the engine revs freer and faster. It isn't just about peak horsepower; it is about \u003ci data-index-in-node=\"125\" data-path-to-node=\"6\"\u003eresponse\u003c\/i\u003e. But here is where COBB is smarter than the other guys: many aftermarket pulleys are \"under-driven\" (made smaller) to save weight, which slows down your accessories and causes dim headlights or dead batteries. \u003cb data-index-in-node=\"344\" data-path-to-node=\"6\"\u003eCOBB Tuning\u003c\/b\u003e kept the \u003cb data-index-in-node=\"365\" data-path-to-node=\"6\"\u003eStock Diameter\u003c\/b\u003e intact. You get all the benefits of the lightweight material without the electrical nightmares or the need for a weird-sized custom belt. It is the perfect balance of performance physics and daily-driver reliability. Swap it out, keep your voltage up, and let that engine sing.\u003c\/p\u003e","brand":"COBB","offers":[{"title":"Default Title","offer_id":41978054082640,"sku":"COBB300102-BK","price":165.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0058\/0252\/4785\/files\/300102_main.jpg?v=1769104643","url":"https:\/\/shop.redline360.com\/products\/cobb-lightweight-crank-pulley-subaru-impreza-2-5-gt-2009-2010-black-300102","provider":"Redline360","version":"1.0","type":"link"}