Earl's Performance GM LS Oil Pressure Gauge Adapter Fittings

Earl's Performance GM LS Oil Pressure Gauge Adapter Fittings are purpose-engineered solutions for installing aftermarket oil pressure gauges on GM LS engine platforms. The GM LS engine block features a metric oil passage at the rear of the block — an uncommon thread specification that typically forces builders to stack multiple fittings or resort to custom fabrication. These adapters eliminate that problem entirely, threading directly into the factory port for a clean, single-adapter installation.

Key Features:

• Threads directly into the metric oil passage on the rear of the GM LS engine block for a clean, no-stack installation
• Compatible with most aftermarket electronic sending units and mechanical gauge hose connections — no custom fabrication required
• Straight-thread metric design sealed with a crush washer for a reliable, leak-free connection
• Machined from high-strength 2024-T8 aluminum — a more durable alloy than commonly used 6061-T6
• Available in an anodized finish for long-term corrosion resistance and a clean under-hood appearance
• Multiple outlet configurations available to suit a variety of gauge and sending unit setups
• Made in the USA to Earl's exacting quality standards

Why Earl's Performance:

Earl's Performance Plumbing brought aviation-grade fluid transfer technology to the automotive performance market over five decades ago. These GM LS Oil Pressure Gauge Adapter Fittings are a natural extension of that legacy — precision-machined components built to perform reliably in demanding performance and swap applications. Whether building a dedicated track car or completing a street LS swap, Earl's offers the configuration to match your gauge or sending unit setup.