#12 Conical Seals (2pk)

The #12 Conical Seals (2pk) by Earl's are essential fluid line connectors engineered for high-performance automotive cooling and fuel system applications. These precision seals are purpose-built for mechanics and enthusiasts who demand leak-free connections in modified engine bays, custom cooling loops, and fuel delivery systems where reliability is non-negotiable. Whether you're assembling a street machine with an upgraded radiator circuit or fabricating a race-spec fuel system, conical seals provide the consistent, repeatable compression fit that separates professional work from amateur installations.

Conical seals function through a wedge-angle geometry that creates a progressive seal as the fitting is torqued; the 45-degree cone surface compresses against the matching seat in your adapter or component, distributing clamping force evenly across the seal face. Earl's seals are manufactured from premium materials designed to withstand thermal cycling, pressure spikes, and fluid compatibility across gasoline, diesel, coolant, and synthetic oil applications. The two-pack quantity allows you to complete dual-circuit modifications or stock spares for future projects, reducing downtime and eliminating trips back to the supplier mid-job.

Size #12 conical seals are standard in most aftermarket cooling manifolds, fuel pressure regulators, and remote oil filter adapters sold for domestic and import performance vehicles. Proper installation requires clean threads, correct torque sequencing (typically 10–15 ft-lbs depending on adapter material), and matching your fitting port size to the #12 specification—verify your hose end or adapter documentation before purchase. Professional shops and serious DIY builders trust Earl's conical seals because they eliminate guesswork and prevent costly coolant or fuel leaks that can damage electronics or create fire hazards in high-performance engine compartments.