Hall Effect Crank Trigger Sensor Housing Provides A Noise Free RPM Signal To The Sniper ECU Billet Distributor Housing Provides Corrosion Resistance And Stylish Looks Distributor Shutter Wheel Is Pinned And Welded To The Shaft, For Decades Of Reliable Accuracy Patented Clear Installation Cap Eliminates Any Confusion While Installing The Distributor Easiest Plug And Play Way To Add Timing Control To A Sniper EFI Installation Brand:HOLLEY SNIPER EFI DISTRIBUTOR ItemNumber#H19565300