{"product_id":"edelbrock-8581-head-bolt-kit-for-60809-60819-409-perf-rpm-cylinder-heads","title":"Edelbrock 8581 - Head Bolt Kit for 60809\/60819 409 Perf RPM Cylinder Heads","description":"\u003cp\u003eEdelbrock 8581 - Head Bolt Kit for 60809\/60819 409 Perf RPM Cylinder Heads\u003c\/p\u003e\u003cp\u003eCylinder Head Bolt Kit - Hex Head - Chromoly - Black Oxide - GM W-Series - Kit\u003c\/p\u003e\u003cp\u003eEdelbrock #8581 is a Head Bolt Kit for 1958-65 Big-Block Chevrolet 348\/409 \"W\" Engines with Edelbrock 60809. 60815, \u0026amp; 60819 Performer RPM Cylinder Heads. This kit contains a complete set of Head Bolts \u0026amp; Washers for a pair of heads.\u003c\/p\u003e\u003cp\u003eThe Edelbrock #8581 bolt kit contain a complete set of the highest quality head bolts and hardened washers available. Cold-formed to ensure molecular integrity and heat treated prior to thread rolling and machining. Reduced diameter bolt heads eliminate the need for valve train removal to facilitate cylinder head re-torqueing. Hardened and parallel-ground washers are included. Rated at 170,000 p.s.i.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHighest Quality Head Bolts\u003c\/li\u003e\n\u003cli\u003eCold-Formed; Heat Treated\u003c\/li\u003e\n\u003cli\u003eEnsures Molecular Integrity\u003c\/li\u003e\n\u003cli\u003eReduced Diameter Bolt Heads\u003c\/li\u003e\n\u003cli\u003eHardened\/Parallel-Ground Washers Included\u003c\/li\u003e\n\u003cli\u003eRated At 170000 psi\u003c\/li\u003e\n\u003cli\u003eManufactured By ARP\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: \u003cspan\u003eCoarse\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eQuantity\u003c\/strong\u003e: \u003cspan\u003eKit\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eThread Diameter\u003c\/strong\u003e: \u003cspan\u003e0.4375\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: \u003cspan\u003eChromoly\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eWashers Included\u003c\/strong\u003e: \u003cspan\u003eYes\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eRGL\u003c\/strong\u003e: \u003cspan\u003eWARNING: This product can expose you to Chromium, which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65warnings.ca.gov.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: \u003cspan\u003e(16) 3.45 in, (20) 4.18\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMinimum Length\u003c\/strong\u003e: \u003cspan\u003e3.45\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eHead Drive Type\u003c\/strong\u003e: \u003cspan\u003eHex\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: \u003cspan\u003eBlack Oxide\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eGrade Type\u003c\/strong\u003e: \u003cspan\u003ePerformance\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Edelbrock","offers":[{"title":"Default Title","offer_id":47296173375626,"sku":"EDEL-8581","price":261.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/0619\/2778\/files\/0_ce064ccfd66da7d74c473c31996f7cad_normalized.jpg?v=1776719739","url":"https:\/\/www.onlyinstock.com\/products\/edelbrock-8581-head-bolt-kit-for-60809-60819-409-perf-rpm-cylinder-heads","provider":"Only In Stock","version":"1.0","type":"link"}