Head Studs, M156

Weistec Engineering

PRODUCT DESCRIPTION



Weistec 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.

With 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.

Key Features:

  • 260,000 psi Tensile Strength

  • 255,000 psi Yield Strength

  • Complete replacement of factory head bolts

  • Improved Head to Block connection eliminating leaks

  • Reusable, unlike the factory bolts which are "one time use"


Vehicle Fitment Matrix:

YEAR MAKE MODEL TRIM ENGINE
2011 MERCEDES-BENZ SL63 AMG BASE (R230) NA 6.2L V8 (M156)
2010 MERCEDES-BENZ SL63 AMG BASE (R230) NA 6.2L V8 (M156)
2009 MERCEDES-BENZ SL63 AMG BASE (R230) NA 6.2L V8 (M156)
2008 MERCEDES-BENZ SL63 AMG BASE (R230) NA 6.2L V8 (M156)
2007 MERCEDES-BENZ R63 AMG BASE (W251) NA 6.2L V8 (M156)
2011 MERCEDES-BENZ ML63 AMG BASE (W164) NA 6.2L V8 (M156)
2010 MERCEDES-BENZ ML63 AMG BASE (W164) NA 6.2L V8 (M156)
2009 MERCEDES-BENZ ML63 AMG BASE (W164) NA 6.2L V8 (M156)
2008 MERCEDES-BENZ ML63 AMG BASE (W164) NA 6.2L V8 (M156)
2007 MERCEDES-BENZ ML63 AMG BASE (W164) NA 6.2L V8 (M156)
2010 MERCEDES-BENZ CLS63 AMG BASE (W219) NA 6.2L V8 (M156)
2009 MERCEDES-BENZ CLS63 AMG BASE (W219) NA 6.2L V8 (M156)
2008 MERCEDES-BENZ CLS63 AMG BASE (W219) NA 6.2L V8 (M156)
2007 MERCEDES-BENZ CLS63 AMG BASE (W219) NA 6.2L V8 (M156)
2010 MERCEDES-BENZ CL63 AMG BASE (W216) NA 6.2L V8 (M156)
2009 MERCEDES-BENZ CL63 AMG BASE (W216) NA 6.2L V8 (M156)
2008 MERCEDES-BENZ CL63 AMG BASE (W216) NA 6.2L V8 (M156)
2007 MERCEDES-BENZ CL63 AMG BASE (W216) NA 6.2L V8 (M156)
2010 MERCEDES-BENZ CLK63 AMG BASE (W209) NA 6.2L V8 (M156)
2009 MERCEDES-BENZ CLK63 AMG BASE (W209) NA 6.2L V8 (M156)
2008 MERCEDES-BENZ CLK63 AMG BLACK SERIES (W209) NA 6.2L V8 (M156)
2008 MERCEDES-BENZ CLK63 AMG BASE (W209) NA 6.2L V8 (M156)
2007 MERCEDES-BENZ CLK63 AMG BASE (W209) NA 6.2L V8 (M156)
2010 MERCEDES-BENZ S63 AMG BASE (W221) NA 6.2L V8 (M156)
2009 MERCEDES-BENZ S63 AMG BASE (W221) NA 6.2L V8 (M156)
2008 MERCEDES-BENZ S63 AMG BASE (W221) NA 6.2L V8 (M156)
2007 MERCEDES-BENZ S63 AMG BASE (W221) NA 6.2L V8 (M156)
2011 MERCEDES-BENZ E63 AMG BASE (W212) NA 6.2L V8 (M156)
2010 MERCEDES-BENZ E63 AMG BASE (W212) NA 6.2L V8 (M156)
2009 MERCEDES-BENZ E63 AMG BASE (W211) NA 6.2L V8 (M156)
2008 MERCEDES-BENZ E63 AMG BASE (W211) NA 6.2L V8 (M156)
2007 MERCEDES-BENZ E63 AMG BASE (W211) NA 6.2L V8 (M156)
2014 MERCEDES-BENZ C63 AMG BLACK SERIES (W204) NA 6.2L V8 (M156)
2014 MERCEDES-BENZ C63 AMG COUPE (W204) NA 6.2L V8 (M156)
2014 MERCEDES-BENZ C63 AMG BASE (W204) NA 6.2L V8 (M156)
2013 MERCEDES-BENZ C63 AMG BLACK SERIES (W204) NA 6.2L V8 (M156)
2013 MERCEDES-BENZ C63 AMG COUPE (W204) NA 6.2L V8 (M156)
2013 MERCEDES-BENZ C63 AMG BASE (W204) NA 6.2L V8 (M156)
2012 MERCEDES-BENZ C63 AMG COUPE (W204) NA 6.2L V8 (M156)
2012 MERCEDES-BENZ C63 AMG BASE (W204) NA 6.2L V8 (M156)
2011 MERCEDES-BENZ C63 AMG BASE (W204) NA 6.2L V8 (M156)
2010 MERCEDES-BENZ C63 AMG BASE (W204) NA 6.2L V8 (M156)
2009 MERCEDES-BENZ C63 AMG BASE (W204) NA 6.2L V8 (M156)
2008 MERCEDES-BENZ C63 AMG BASE (W204) NA 6.2L V8 (M156)
2015 MERCEDES-BENZ SLS AMG BLACK SERIES (W197) NA 6.2L V8 (M159)
2015 MERCEDES-BENZ SLS AMG GT (W197) NA 6.2L V8 (M159)
2015 MERCEDES-BENZ SLS AMG BASE (W197) NA 6.2L V8 (M159)
2014 MERCEDES-BENZ SLS AMG BLACK SERIES (W197) NA 6.2L V8 (M159)
2014 MERCEDES-BENZ SLS AMG GT (W197) NA 6.2L V8 (M159)
2014 MERCEDES-BENZ SLS AMG BASE (W197) NA 6.2L V8 (M159)
2013 MERCEDES-BENZ SLS AMG BLACK SERIES (W197) NA 6.2L V8 (M159)
2013 MERCEDES-BENZ SLS AMG GT (W197) NA 6.2L V8 (M159)
2013 MERCEDES-BENZ SLS AMG BASE (W197) NA 6.2L V8 (M159)
2012 MERCEDES-BENZ SLS AMG GT (W197) NA 6.2L V8 (M159)
2012 MERCEDES-BENZ SLS AMG BASE (W197) NA 6.2L V8 (M159)
2011 MERCEDES-BENZ SLS AMG BASE (W197) NA 6.2L V8 (M159)
2010 MERCEDES-BENZ SLS AMG BASE (W197) NA 6.2L V8 (M159)