Eagle

About Eagle Specialty Products

Eagle Specialty Products has earned its place as one of the most trusted names in high-performance engine building. Founded in August 1992, Eagle spent nearly a decade prior developing the technology, supplier relationships, and engineering know-how that would define the brand. What started with just a handful of part numbers has grown into a catalog respected by racers and performance enthusiasts worldwide.

The brand's core mission has never wavered: engineer rotating assembly components that hold up under extreme stress without breaking the bank. That philosophy, combined with rigorous quality control and the use of premium materials like ASME-certified 4340 chromoly steel, has made Eagle the largest aftermarket connecting rod manufacturer in the world.

What Eagle Specialty Products Makes

Eagle's product lineup revolves around the heart of the engine — the rotating assembly. Their Engine Crankshaft Rotating Assembly kits are among the most popular offerings in the catalog, bundling a matched crankshaft, connecting rods, pistons, rings, and bearings into a single, cohesive package. These kits span street/strip builds all the way to full-on competition applications, with components spec'd to work together from the moment they drop into the block.

At the core of nearly every Eagle build is the connecting rod. Eagle's Engine Connecting Rods come in multiple configurations — including their well-known I-Beam SIR series for naturally aspirated performance builds and the heavy-duty H-Beam ESP line engineered for high-boost and high-horsepower applications. Every rod in the H-Beam lineup is 100% CNC-machined and uses ARP fasteners as standard equipment, ensuring the dimensional consistency that big power demands.

On the crankshaft side, Eagle offers a tiered selection under their Engine Crankshaft category to fit virtually any budget and power goal. Cast steel cranks serve as a reliable OE replacement upgrade for street engines, forged 4140 steel units bridge the gap for mid-level performance use, and top-shelf forged 4340 steel cranks are the go-to choice when the horsepower target climbs into serious territory.

Eagle also supplies Engine Pistons — purpose-built slugs designed specifically to complement Eagle's rods and cranks within a rotating assembly. Whether the application calls for a hypereutectic street piston or a forged unit rated for forced induction, Eagle sources pistons engineered to integrate seamlessly into their kits.

Rounding out the lineup, Eagle stocks Engine Connecting Rod Bolts for builders who need to service or upgrade existing rods. ARP-supplied hardware is a hallmark of Eagle's quality standards, and replacement bolt sets ensure that a worn fastener never becomes the weak link in an otherwise stout build.

Why Builders Trust Eagle

Eagle Specialty Products occupies a unique market position: premium-grade materials and manufacturing discipline at prices that make sense for real-world engine builds. Continuous improvements in design, materials, and manufacturing over three-plus decades have cemented Eagle's reputation not just as a volume supplier, but as a brand that professional engine builders and weekend racers rely on when the stakes are high.