{"product_id":"forged-chromoly-rocker-arms-1-40-ratio","title":"Forged Chromoly Rocker Arms 1.40 Ratio","description":"The EMPI 21-2164 rocker arm set is engineered for performance in 13-1600cc Beetle-style engines. Constructed from forged chromoly, these rocker arms are precision-ground and heat-treated for enhanced durability. The design incorporates bronze bushings with through-hole lubrication, offering a more robust solution compared to older needle bearing designs. Alloy adjusting screws are drilled through for complete lubrication of both screws and rocker arms. All shafts, blocks, and shims are made from high-strength alloys, and chromoly rocker arm studs are included to complete the kit.\n\nThis set is ideal for both mild street applications and high-performance engines. The 1.40 ratio is designed to increase valve lift, potentially improving engine breathing and power output. The product comes as a pair and includes necessary hardware for installation.\n\nA critical note for installation: custom length pushrods are required when using high-ratio rocker arms. Stock-length pushrods will not suffice. The precise length needed must be calculated during a test assembly of the engine to achieve correct rocker geometry for your specific engine combination. The product is compatible with EMPI's 21-2162-0 and 21-2164-0 adjustment screws and nuts.","brand":"EMPI","offers":[{"title":"Default Title","offer_id":52687946350904,"sku":"21-2164","price":169.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/663683497.webp?v=1784887894","url":"https:\/\/store.motormia.co\/products\/forged-chromoly-rocker-arms-1-40-ratio","provider":"MOTORMIA","version":"1.0","type":"link"}