Home » Billet Aluminum Oil Diverter and Gallery Plug for GM Gen III/IV Vortec LS and LSX

Billet Aluminum Oil Diverter and Gallery Plug for GM Gen III/IV Vortec LS and LSX

SKU: 1005012416165494-Silver
Color
€19,09
-41% €32,45 €19,09

Factory plastic gallery plugs on GM Gen III and Gen IV small-block engines frequently crack under thermal stress, allowing crankcase oil to bypass critical passages and drop system pressure. This billet aluminum oil diverter and gallery plug replaces OEM Part Number 12573460 with a precision CNC-machined 6061-T6 alloy barbell that maintains dimensional stability through repeated heat cycles. Designed for a direct bolt-in fitment across LS1, LS2, LS3, LS6, LQ4, L33, LQ9, L92, L76, L99, LSA, LM4, and Vortec truck engines from 4.8L through 6.2L, the assembly relies on three high-temperature FKM rubber rings to deliver consistent, leak-free sealing under boost or sustained high-RPM loading.

Benefits & Practical Tips

  • Upgrade during routine oil service to permanently eliminate factory injection-molded failures and restore stable oil pump scavenging.
  • The heat-treated aluminum core is fully reusable; simply degrease the mounting channel and press fresh FKM seals into place for each maintenance cycle.
  • Coordinate installation with standard external oil cooler lines or LS-style windage trays to maximize crankcase ventilation and reduce aerated oil conditions.

Product Specifications

  • Base Material: 6061-T6 Aluminum Alloy
  • Manufacturing Method: Five-Axis CNC Machining
  • Application Range: GM Gen III/IV Vortec, LS & LSX Series Blocks
  • Engine Displacements: 4.8L, 5.3L, 5.7L, 6.0L, 6.2L
  • OEM Replacement ID: GM Part Number 12573460
  • Seal Type: Triple High-Temperature FKM Viton O-Rings

Package Includes

  • 1x Billet Aluminum Oil Diverter Barbell & Front Gallery Plug
  • 1x Factory-Preloaded Set of FKM Rubber Seals

Installation Reminders

Clean all factory silicone residues from the cylinder block feed port before positioning the new plug. Apply light oil to the FKM rings during placement to prevent twisting, and torque mounting hardware according to manufacturer specifications to protect aluminum intake threads.

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