These PROFORM header bolts are assembled using a set of factory installed super hard wedge-locking washers, so there are no additional components. Once correctly torqued, the washers’ serrated teeth grip the bottom of the bolt head and the top surface of the header flange. This system prevents rotational movement of the bolt due to the wedge-locking tension created by the two washers interfacing cams. Engine vibration actually increases the wedge locking tension, keeping the bolt secure. When removing the headers, these PROFORM header bolts can be un-tightened with a normal wrench. To view a video of how these unique bolts work visit http://youtu.be/mmZg-pLdds
PROFORM’s 2013 catalog is full of new licensed performance, dress-up and vehicle enhancement parts and accessories for Chevrolet® and Ford®. Innovation, creative design, high quality and affordability are the hallmarks of PROFORM parts in engine dress-up, water pumps, carburetors, alternators, starters, fans, distributors, rocker arms, engine building tools, vehicle scales and more! Visit www.ProformParts.com for everything
For additional information contact the folks at Proform/Specialty Auto Parts, USA, Inc., PO Box 306, Roseville, MI 48066, 586-774-2500, Fax: 586-778-7775 or visit www.proformparts.com.
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