{"product_id":"wedge-locking-header-bolts-3-8-x-3-4l-16-66752","title":"Fits GM BB 396-502 exc 348 and 409, Ford 5.0L, SB 289-302-351W, Mopar 413 66752","description":"\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","brand":"Proform","offers":[{"title":"Default Title","offer_id":42736143073391,"sku":"BCHW-66752","price":37.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0594\/7405\/1183\/files\/PFM66752.jpg?v=1735264073","url":"https:\/\/616autoparts.com\/products\/wedge-locking-header-bolts-3-8-x-3-4l-16-66752","provider":"616 Auto Parts","version":"1.0","type":"link"}