Oil Diverter Barbell and Front Gallery Plug Billet Aluminum for GM LS Gen III IV

Oil Diverter Barbell & Front Gallery Plug — Billet Aluminum for GM LS Gen III/IV

Upgrade the oil routing on GM LS engines with this billet aluminum oil diverter barbell and front gallery plug. Crafted from 6061-T6 aluminum and precision CNC machined, this robust centerpiece replaces worn OEM plastic plugs with a durable, reusable solution. It’s designed for GM Gen III/IV engines and is compatible with Vortec trucks, covering the LS/LSX family—including LS1, LS3, LS2, LQ4, L33, LQ9, LS6, L92, L76, L99, LSA, and LM4—and suits 4.8L, 5.3L, 5.7L, 6.0L and 6.2L engines.

The assembly features three high-temperature FKM O-rings to deliver a reliable seal, reducing oil bypass and promoting steady oil flow for consistent engine performance under a variety of driving conditions. The main aluminum body is reusable, with O-rings replaced during service, offering a cost-effective upgrade over OEM plastic plugs that can wear out over time. It directly fits the worn OEM plastic plug (GM Part Number 12573460) on GM LS Gen III & Gen IV engines.

Durability meets precision: 6061-T6 aluminum alloy, CNC machined for tight tolerances and enduring wear resistance. Broad engine compatibility ensures this part supports your LS build or maintenance project with confidence.

All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.

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Benefits & Tips

• Enhances oil flow and sealing on GM LS Gen III/IV engines, reducing bypass and helping maintain stable operation under load.
• Direct-fit replacement for worn OEM plastic plugs, with reusable aluminum body and replaceable O-rings to extend service life.
• Keep a spare set of high-temperature FKM O-rings on hand for easy servicing without downtime.

Product Specifications

• Brand: None
• Origin: Mainland China
• Material: 6061-T6 aluminum alloy (CNC machined)
• Compatibility: GM Gen III/IV engines, Vortec trucks; LS/LSX family including LS1, LS3, LS2, LQ4, L33, LQ9, LS6, L92, L76, L99, LSA, LM4
• Engine sizes: 4.8L, 5.3L, 5.7L, 6.0L, 6.2L
• Sealing: 3 high-temperature FKM O-rings
• Replacement part reference: Direct fit for OEM plastic plug (Part Number 12573460)
• Sealing performance: Stops oil bypass, enhances oil flow, maintains stable engine operation
• Durability & maintenance: Aluminum main body is reusable; O-rings replaced during servicing