{"product_id":"proform-wedge-locking-header-bolts-m8-0-984-long-12-bolt-set","title":"Wedge-Locking Header Bolts; M8, 0.984\" Long, 12 Bolt Set","description":"\u003ch3\u003e\u003cstrong\u003eABOUT THIS PRODUCT\u003c\/strong\u003e\u003c\/h3\u003e\nEach 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.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eProduct Features:\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003eExhaust Header Bolt\u003c\/li\u003e\n\u003cli\u003eNickel Plated Finish\u003c\/li\u003e\n\u003cli\u003eMade from Grade 8 Steel\u003c\/li\u003e\n\u003cli\u003eWedge-Locking Technology\u003c\/li\u003e\n\u003cli\u003eFits GM LS Engines with 1\/4in Wide Flange\u003c\/li\u003e\n\u003cli\u003eHex Head Type\u003c\/li\u003e\n\u003cli\u003eM8 Thread X 0.984 Inch Long\u003c\/li\u003e\n\u003cli\u003e100% New Components; Not Re-man or Refurbished\u003c\/li\u003e\n\u003cli\u003ePre-Assembled Wedge-Locking Washers\u003c\/li\u003e\n\u003cli\u003eIncludes 12 Bolts and Washers\u003c\/li\u003e\n\u003cli\u003eSold as a Set\u003c\/li\u003e\n\u003cli\u003ePROFORM Parts Brand Product\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Proform (500)","offers":[{"title":"Default Title","offer_id":52766917067028,"sku":"66754","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/4214\/9396\/files\/12434963_prf_66754_pri_larg.jpg?v=1783467502","url":"https:\/\/districtmailing.com\/products\/proform-wedge-locking-header-bolts-m8-0-984-long-12-bolt-set","provider":"District Mailing","version":"1.0","type":"link"}