Two-piece socket and post: Enables secure installation and allows water to drain from the engine block
Threaded all the way through socket: Ensures a watertight seal for reliable sensor operation
Direct replacement for one-piece post: Simplifies installation and maintains compatibility
Sold individually: Allows for precise replacement without unnecessary parts
Summarized by Shop
Improved replacement socket & stud for 2006 and newer Indmar engine knock sensors. Newer version socket is two pieces where the socket stays mounted inside the engine block and post comes out with sensor. Product Specs:
Indmar Part# 495039B-1
Stud & Socket Only, Actual Sensor Sold Separate - Use Part # 551392