LT LS M28 to 3/8" NPT Coolant Temperature Sensor Adapter Fitting LT1 LT4 L83 LS1
$36.99
Gen V LT Vacuum Pump Plate Compatible with LT1 L82 L83 LV3 L84 L86 L87. Model: M28. Replaces your engine block coolant drain plug with an 3/8" NPT port (will not fit oem LS/LT sensor thread). Coolant Temperature Sensor Fitting.