Gen V LT Vacuum Pump Flange Cover Plate Adapter 551123 For LT1 LT2 L82 L83

Gen V LT Vacuum Pump Flange Cover Plate Adapter

This vacuum pump flange cover plate adapter seals off the factory vacuum pump port on Gen V engines, referencing part number 551123.

Overview

The Gen V LT vacuum pump flange cover plate adapter is designed to safely block off the oil passage when removing the mechanical vacuum pump. This vacuum pump flange cover plate adapter is essential for custom engine swaps and clean engine bay builds. Performance enthusiasts will benefit from the clean aesthetic and reliable sealing offered by this vacuum pump flange cover plate adapter.

Built For Performance

• CNC-machined from premium 6061-T6 billet aluminum for strength and longevity.
• Features a precision-engineered O-ring groove for a leak-free seal without messy RTV.
• Corrosion-resistant natural aluminum finish matches factory engine components.
• Includes high-strength mounting bolts for a straightforward installation.

Fits These Machines

• for GM Gen V LT1 engines
• for GM Gen V LT2 engines
• for GM Gen V L82 engines
• for GM Gen V L83 engines

On-The-Job Use

• Completing a custom engine swap where the mechanical vacuum pump is deleted.
• Sealing the engine block oil galley during high-performance engine builds.
• Clearing up space in the engine bay for aftermarket turbocharger piping.

Specs At A Glance

Good To Know

Q: Do I need to use silicone sealant with this plate? A: No, the included high-quality rubber O-ring provides a complete oil-tight seal without the need for additional silicone.

Q: Why would someone delete the mechanical vacuum pump? A: Mechanical pumps are often deleted during swaps or performance builds to reduce accessory drag and simplify the engine accessory drive layout.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.