ARP 100-3222 Water Pump Pulley Stud Kit for 5/16-24 X 2.500?. 8740. black oxide. 12pt (fits 1.250? fan spacer) ymm_45 which is then replaced by

which is then replaced by the Akrapovič Evolution Line system

Fits Following Engines:Chevrolet Chevrolet LS Gen III/IV (2004 & later)

Specifications Socket Size(s) 12mm 12pt UHL 100mm Thread Length 26mm Grip Length 74mm Thread Diameter-Spacing M10 x 1

it helps eliminate main cap walk and fretting while protecting the threads in the engine block

ECE type approval is only valid for cars equipped with otto/gasoline particulate filter

ARP 100-3222 Water Pump Pulley Stud Kit for 5/16-24 X 2.500?. 8740. black oxide. 12pt (fits 1.250? fan spacer) ymm_45 which is then replaced bySpecifications Socket Size(s) 3 8 12pt, 1 8 Allen