{"product_id":"holley-harmonic-balancer-bolt-chevy-big-block-12-point-97-321","title":"Holley Harmonic Balancer Bolt - Chevy Big Block - 12-Point - 97-321","description":"Holley Harmonic Balancer Bolt - Chevy Big Block - 12-Point - 97-321\u003cbr\u003e\u003cbr\u003eReplacement harmonic balancer bolt with thick washer for Big Block Chevy Mid-Mount Accessory drive system. 12-Point, 1\/2\" Wrench Size, 1\/2\"-20 x 2.500\" Under Head Length, Washer diameter 1.5\" x 0.200\" Thick.\u003cbr\u003e\u003cbr\u003eReplacement Harmonic Balancer Bolt with Thick Washer, for Chevy Big Block 396-454 with Holley Mid-Mount Accessory Drive System 20-242 \u0026amp; 20-242BK\u003cbr\u003e\u003cbr\u003e","brand":"Holley","offers":[{"title":"Default Title","offer_id":48148250689794,"sku":"HOL-97-321","price":20.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0618\/0354\/files\/b6729f44bd71984ac211730663f69a85_1.jpg?v=1785015872","url":"https:\/\/www.lethalperformance.com\/products\/holley-harmonic-balancer-bolt-chevy-big-block-12-point-97-321","provider":"Lethal Performance","version":"1.0","type":"link"}