Eagle B16621ES030 Ford 302 Street & Strip Balanced Rotating Assembly Kit - 331 CID

The Eagle B16621ES030 is a complete balanced rotating assembly engineered for Ford 289/302 small block engines, delivering 331 cubic inches of displacement. This Street & Strip assembly provides a cost-effective alternative to reworking original equipment parts, offering reliable performance for naturally-aspirated, pump gas street engines.

Complete Assembly Includes:

• 3.250" cast steel crankshaft with .092" fillet radiuses for enhanced strength
• 5.400" forged 5140 steel I-Beam connecting rods (Eagle SIR series)
• 3/8" ARP 8740 capscrew rod bolts for secure fastening
• Hypereutectic aluminum pistons (4.030" bore, .030" oversize)
• Plasma-moly piston rings with standard gap or file-fit specification
• King SI series rod and main bearings
• Pioneer harmonic damper
• Pioneer flexplate (157 tooth count)

Key Features:

• Factory balanced assembly - ready to install with no additional balancing required
• Internal balance design for smoother operation
• Rods are bushed for full-floating piston pins
• Engineered for engines producing up to 500 horsepower
• Ideal for street performance, hot rod, and muscle car applications

Eagle Specialty Products utilizes precision manufacturing processes to ensure smooth surfaces that promote better oil flow, improved lubrication, and reduced wear. This assembly is designed specifically for +.030" overbore applications and represents excellent value for engine builders seeking quality components without sacrificing reliability.