Plugs and caps provide secure sealing and protection for open ports, lines, and fittings in fuel, oil, and cooling systems. Designed to prevent leaks, contamination, and fluid loss, these components are essential during maintenance, assembly, or storage. Available in a variety of materials and thread types, our plugs and caps deliver a precise fit and reliable performance under pressure. Shop high-quality plugs and caps engineered for durability and ease of use in any application.
Upgrade your racing engine setup with the Earl's Oil Fill Cap w/ PCV Vent, designed for late-model GM and Ford engines. Precision-machined from billet...
Description:The MotoRad MO99 Oil Filler Cap is designed to deliver a perfect OE-style fit and dependable performance across a wide range of domestic and...
Ensure leak-free performance in your engine plumbing with the Earl's -3 AN Plug, designed for precision fit and durability. Made from high-quality 2024 aluminum...
Upgrade your engine setup with the Earl's -6 AN Plug, crafted from high-quality 2024 aluminum with a durable blue anodized finish. Designed for reliable...
Secure your vehicle’s fuel and air systems with Earl's AN Port Plug Hex Head, engineered for precise fitment and long-lasting performance. Crafted from premium...
Secure your plumbing and custom applications with Earl’s 1/8" NPT Internal Plugs, designed for precision sealing and long-lasting durability. Constructed from lightweight 2024 aluminum...
Secure and protect your plumbing system with the Earl’s -6 AN Cap, engineered for durability and precision in any custom or performance application. Designed...
Upgrade your plumbing and custom build projects with Earl’s 1/4" NPT Internal Plug Set, crafted from lightweight 2024 aluminum and finished in anodized blue...
Keep your performance hoses clean and protected with Earl's Plastic Plugs for 4 AN fittings. Designed for mechanics and enthusiasts, these durable plastic plugs...
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