2001-2010 GM 6.6L DURAMAX -GM 11561233 TORSION BAR NUT 2001-2010 GM 6.6L DURAMAX The GM 11561233 Torsion Bar Nut is a direct replacement for the factory hardware in your 2001-2010 GM 6.6L Duramax. From being adjusted over time, the factory Torsion Bar Nut is known to strip or wear out... MSRP: Was: Now: $22.87 Add to Cart The item has been added