{"product_id":"pa-alternator-pulley","title":"Perrin Performance Lightweight Alternator Pulley for the Subaru WRX","description":"\u003cp\u003eThe Perrin Performance Lightweight Alternator Pulley replaces the factory clutch-style alternator pulley on FA-engine Subaru WRX models with a precision-machined, solid 6061-T6 billet aluminum unit finished in an anodized coating. Weighing just 0.20 lbs versus the OEM unit's 0.92 lbs, it reduces rotational mass on the accessory drive for more responsive power delivery. Laser-etched grooves maintain precise belt seating and the pulley is compatible with both OEM and aftermarket serpentine belts. Fitment covers 2015–2026 Subaru WRX models running the FA-series engine.\u003c\/p\u003e\u003cp\u003eBeyond the weight reduction, this pulley eliminates the OEM overrunning alternator decoupler (OAD) clutch mechanism — a known failure point on Subaru FA-engine vehicles that can produce knocking noises, battery charging irregularities, and accelerated belt wear as mileage accumulates. Available in three anodized finishes: Black (PSP-ENG-121BK), Blue (PSP-ENG-121BL), and Red (PSP-ENG-121RD). Includes one alternator pulley and one M17 nut.\u003c\/p\u003e\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e(1) PERRIN Alternator Pulley\u003c\/li\u003e\n\u003cli\u003e(1) Flange Nut\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Perrin Performance","offers":[{"title":"Black","offer_id":43859966951489,"sku":"PSP-ENG-121BK","price":45.75,"currency_code":"USD","in_stock":true},{"title":"Blue","offer_id":43859966984257,"sku":"PSP-ENG-121BL","price":45.75,"currency_code":"USD","in_stock":true},{"title":"Red","offer_id":43859967017025,"sku":"PSP-ENG-121RD","price":45.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0696\/8642\/7713\/files\/3b81c16af77c9ea515ede27117331cf5.jpg?v=1777483714","url":"https:\/\/www.awdmods.com\/products\/pa-alternator-pulley","provider":"AWDMods","version":"1.0","type":"link"}