{"product_id":"proform-66823-wedge-locking-header-bolts","title":"Proform 66823 - Wedge-Locking Header Bolts","description":"\u003cp\u003eProform 66823 - Wedge-Locking Header Bolts\u003c\/p\u003e\u003cp\u003eHeader Bolt - Locking - 3\/8-16 in Thread - 0.75 in Long - Hex Head - Steel - Nickel Plated - Set of 16\u003c\/p\u003e\u003cp\u003eFits GM BB 396-502 exc 348 and 409, Ford 5.0L, SB 289-302-351W, Mopar 413\u003c\/p\u003e\u003cp\u003ePROFORM Wedge-Locking Header Bolts ELIMINATE the need to constantly re-tighten collector bolts, and without the need for clips, pins, racing-wire, chemicals or gunk. The secret is in the Wedge-Locking Washer's super-hardened external teeth that \"bite\" into the bottom of the bolt head and the top flange surface. Vibrations that normally cause other bolts to loosen, are blocked by the wedge-locking action that uses tension, instead of friction to stay snug. In fact, contact with oil actually facilitates the effect. Installs\/uninstalls with a normal wrench, lubricate, and then reuse. Each set comes with sixteen Hex Head, Grade 8 (12.9) steel bolts (3\/8\"-16 thread, 3\/4\" long) with a black oxide finish, and pre-assembled Wedge-Locking Washers.\u003c\/p\u003e\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eFeature\/Benefit\u003c\/strong\u003e: \u003cspan\u003eWedge-Locking Technology Eliminates Constantly Re-Tightening Exhaust Collector Bolts; Blocks Bolt-Loosening Rotation caused by Vehicle Vibrations.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eApplications\u003c\/strong\u003e: \u003cspan\u003eFits GM BB 396-502 exc 348 and 409, Ford 5.0L, SB 289-302-351W, Mopar 413\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCategory\u003c\/strong\u003e: \u003cspan\u003eHeader Bolts\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003ePart Type\u003c\/strong\u003e: \u003cspan\u003eHeader Bolts\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proform","offers":[{"title":"Default Title","offer_id":47346929696906,"sku":"BCHW-66823","price":52.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/0619\/2778\/files\/0_66823_normalized_46251ed8-c75e-43fa-b202-f522ac1df071.jpg?v=1777522561","url":"https:\/\/www.onlyinstock.com\/products\/proform-66823-wedge-locking-header-bolts","provider":"Only In Stock","version":"1.0","type":"link"}