{"product_id":"proform-66754-wedge-locking-header-bolts","title":"Proform 66754 Wedge-Locking Header Bolts","description":"\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eDescription \u0026amp; Features\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003e\u003cstrong\u003eProform 66754 Wedge-Locking Header Bolts\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEach PROFORM 12.9 Steel (equiv. Grade 8+) Header Bolt is permanently assembled with a pair of special washers. When the bolt is torqued to 28+ ft-lbs, the washers super-hardened external teeth bite into and grip the bottom of the bolt head and the top surface of the header. After being self-locked in this manner, any bolt-loosening rotation is blocked by a wedge-locking action created by the washers interfacing, matching cams. It's an uphill climb: vibration that might ordinarily loosen the bolt actually increases the wedge-locking tension, securing the bolt even more. Because this simple wedge-locking method uses tension instead of friction, contact with oil actually facilitates the wedge effect. When changing headers, PROFORM Header Bolts can be untightened with a normal wrench, lubricated, and reused.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/summary\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHeader Bolts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHeader Bolts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFits GM LS Engines with 1\/4-inch Wide Flange\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFeature\/Benefit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWedge-Locking Technology Eliminates Constantly Re-Tightening Exhaust Collector Bolts; Blocks Bolt-Loosening Rotation caused by Vehicle Vibrations.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003ePackaging Information\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eWeight: 0.65 lbs\u003cbr\u003eDimensions: 6.75 x 4.5 x 1.75 IN\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003e1 Year Warranty\u003c\/p\u003e\u003c\/details\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003e⚠ Fitment Notes\u003c\/strong\u003e\u003c\/summary\u003e\u003cul\u003e\n\u003cli\u003eHex Head;  M8 X .984in;  Chevy LS;  Nickel Plt\u003c\/li\u003e\n\u003cli\u003eNickel Plt;  Chevy LS;  M8 X .984in; Hex Head\u003c\/li\u003e\n\u003cli\u003eHex Head;  M8 X .984in;  Nickel Plt;  Chevy LS\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/details\u003e","brand":"Proform","offers":[{"title":"Default Title","offer_id":48567951032538,"sku":"BCHW-66754","price":34.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/9800\/1114\/files\/P01_bf274979-c7d0-4c8d-a30f-a6b36c1cdaf8.jpg?v=1788915295","url":"https:\/\/www.zerodarkaftermarket.com\/products\/proform-66754-wedge-locking-header-bolts","provider":"Zerodarkaftermarket","version":"1.0","type":"link"}