Federal Mogul E251X30 Economy Cast Iron Piston Ring Set Bore - 4.030

The Federal Mogul E251X30 is an economy-grade piston ring set designed for small block Chevy 350 and 383 engines with a 4.030-inch bore (.030-inch oversize). This complete 8-cylinder kit provides reliable sealing performance at an economical price point, making it ideal for standard rebuilds and budget-conscious engine projects.

Key Specifications:

• Bore Size: 4.030 inches (.030-inch oversize)
• Ring Width Configuration: 5/64" x 5/64" x 3/16" (Top Ring/Second Ring/Oil Ring)
• Ring Material: Cast iron construction
• Tension: Standard tension design
• Set Quantity: 8-cylinder kit (includes rings for all cylinders)

Features:

• Cast iron top and second compression rings for durable, long-lasting performance
• Stainless steel oil ring assembly for excellent oil control
• Standard tension design suitable for stock and mild performance applications
• OE-quality construction from Federal Mogul's Sealed Power brand
• Engineered for proper combustion sealing and minimal oil consumption

This ring set is commonly used in Chevy 327, 350, and 383 small block engine rebuilds where the cylinders have been bored .030-inch oversize. Federal Mogul's economy line offers dependable performance for street-driven vehicles and everyday applications.