{"product_id":"weistec-head-studs-m156-02-156-00304-1","title":"Weistec Head Studs, M156 for Mercedes-Benz","description":"\u003cp\u003eWeistec has exclusively partnered with ARP, the top name in performance engine hardware. Head studs are used to fasten the heads to the block in place of the factory head bolts. The connection between the cylinder heads and the block is a complex part of the engine. Coolant and oil flow back and forth between the block and the cylinder heads. The head gasket keeps the coolant, oil, and air charge in the cylinders separate from each other with the help of pressure generated by the head bolts. The factory head bolts are \"torque to yield\" meaning that when installed, they are tightened to the point where they permanently stretch. There have been stock M156 oil leak issues resulting from a poor connection between the cylinder heads and the block which in part can be attributed to the head bolts.\u003c\/p\u003e\n\u003cp\u003eWith 260,000+PSI of tensile strength, our ARP 625+ head studs are able to hold down the heads with far greater pressure than the factory head bolts, without permanent stretching. The result is a more reliable performance engine that will not be susceptible to leaks between the heads and block. Quality head studs are among the top items in the list of parts that allow an engine to reliably reach high power levels.\u003c\/p\u003e\n\u003ch2\u003eKey Features:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e260,000 psi Tensile Strength\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e255,000 psi Yield Strength\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eComplete replacement of factory head bolts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eImproved Head to Block connection eliminating leaks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReusable, unlike the factory bolts which are \"one time use\"\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eVehicle fitment\u003c\/h3\u003e\n\u003cul class=\"fitment-list\"\u003e\n\u003cli\u003e2006-2009 Mercedes-Benz CLK63 AMG Cabriolet\u003c\/li\u003e\n\u003cli\u003e2006-2009 Mercedes-Benz CLK63 AMG Coupe\u003c\/li\u003e\n\u003cli\u003e2006-2010 Mercedes-Benz CL63 AMG Coupe\u003c\/li\u003e\n\u003cli\u003e2007-2009 Mercedes-Benz CLK63 AMG Black Series\u003c\/li\u003e\n\u003cli\u003e2007-2010 Mercedes-Benz CLS63 AMG Coupe\u003c\/li\u003e\n\u003cli\u003e2007-2010 Mercedes-Benz S63 AMG Base\u003c\/li\u003e\n\u003cli\u003e2007-2011 Mercedes-Benz E63 AMG Base\u003c\/li\u003e\n\u003cli\u003e2007-2011 Mercedes-Benz ML63 AMG Base\u003c\/li\u003e\n\u003cli\u003e2007-2014 Mercedes-Benz C63 AMG Base\u003c\/li\u003e\n\u003cli\u003e2007-2014 Mercedes-Benz C63 AMG T-Modell\u003c\/li\u003e\n\u003cli\u003e2007 Mercedes-Benz R63 AMG Base\u003c\/li\u003e\n\u003cli\u003e2008-2011 Mercedes-Benz SL63 AMG Roadster\u003c\/li\u003e\n\u003cli\u003e2010-2015 Mercedes-Benz SLS AMG Coupe\u003c\/li\u003e\n\u003cli\u003e2011-2014 Mercedes-Benz C63 AMG Black Series\u003c\/li\u003e\n\u003cli\u003e2011-2014 Mercedes-Benz C63 AMG Coupe\u003c\/li\u003e\n\u003cli\u003e2011-2015 Mercedes-Benz SLS AMG Roadster\u003c\/li\u003e\n\u003cli\u003e2012-2015 Mercedes-Benz SLS AMG GT Coupe\u003c\/li\u003e\n\u003cli\u003e2012-2015 Mercedes-Benz SLS AMG GT Roadster\u003c\/li\u003e\n\u003cli\u003e2013-2015 Mercedes-Benz SLS AMG Black Series\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/drive.google.com\/open?id=15bYAPByG6TP5qgycBR6yVlqyfNrS9xSV\" target=\"_blank\" rel=\"noopener\"\u003eInstallation manual\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eWeistec part number: 02-156-00304-1 · UPC: 810089562418\u003c\/p\u003e","brand":"Weistec","offers":[{"title":"Default Title","offer_id":60049879728414,"sku":"WEI02-156-00304-1","price":1399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/7965\/3406\/files\/m156studs_1.jpg?v=1790378046","url":"https:\/\/shop.signatureautohaus.com\/products\/weistec-head-studs-m156-02-156-00304-1","provider":"Signature Autohaus","version":"1.0","type":"link"}