{"product_id":"wedge-locking-header-bolts-4-66823","title":"Proform Wedge-Locking Header Bolts — 4\" — 1975, 1977-1978, 1982, 1984-1994, 1996-1999 Chevy Corvette \u0026 more (66823)","description":"\u003cp data-r2-lead=\"1\"\u003eProform Wedge-Locking Header Bolts, listed for the 1974-1978 and 1982-1986 Chevrolet C10 and 80 more vehicles.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ePart number:\u003c\/strong\u003e 66823\u003c\/p\u003e\u003c!--mt-desc-append-20260825--\u003e\n\u003cdiv class=\"mt-gen-details\"\u003e\n\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\n\u003cp\u003e\u003csmall\u003eWeight: 1 lb\u003c\/small\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!--\/mt-desc-append-20260825--\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Proform\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 66823\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 year (manufacturer)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShipping carton:\u003c\/strong\u003e 6.75 × 4.5 × 1.75 in (17 × 11 × 4.4 cm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShipping weight:\u003c\/strong\u003e 0.5 kg (1 lb)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Proform","offers":[{"title":"Default Title","offer_id":48857808044224,"sku":"PFM66823","price":58.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0762\/4772\/8320\/files\/66752_Wedge-locking_collage_91e67749-0f81-4b5e-9d1d-1b925a7283eb.jpg?v=1787293652","url":"https:\/\/mapletorque.ca\/products\/wedge-locking-header-bolts-4-66823","provider":"MapleTorque","version":"1.0","type":"link"}