Designed to mimic GM 88958607, these dampeners will fit any GM Gen III** block with the holes already drilled and tapped.  Engine fitment includes the popular LS1, LS6, and 5.3 truck engines.  Dampeners will work with either single row or double row chains. The bolt spacing measures ~2.1” center to center and the dampener is machined from a high temperature, low friction nylon.  
 
** Due to variations in GM manufacturing, some 2004, later model blocks, and reproduction blocks may have the narrower LS2 bolt spacing of 1.7”   Please verify hole existence and spacing on your block before purchase. 
 
Made in the USA!!