Manley 290760RH SBC Rotating Assembly Stroke Flat Top Piston Kit - 355 3.480 4cc

The Manley 290760RH is a complete rotating assembly kit engineered for Small Block Chevy (SBC) 355 cubic inch engines, featuring a 3.480-inch stroke and -4cc flat top pistons. This kit provides a solid high-performance foundation for builders looking to maximize power output from an SBC platform.

At the core of this assembly is a lightweight 4340 forged steel crankshaft paired with 4340 forged steel H-beam connecting rods secured with 7/16" ARP 8740 cap screws, rated for up to 750 horsepower — with optional ARP 2000 cap screws available for builds targeting up to 1,500 hp.

Key Features:

• 4340 forged steel crankshaft — lightweight, non-twist design for internal balance
• 4340 forged H-beam connecting rods with 7/16" ARP rod bolts
• 2618 alloy Platinum Series forged aluminum pistons — -4cc flat top design for optimized compression
• Premium chromoly wrist pins included
• Total Seal "Classic Race" piston ring set — plasma moly ductile iron top rings, reverse-twist cast iron second rings, and three-piece oil rings
• Clevite "H" Series rod bearings and "P" Series main bearings included
• 3.480-inch stroke for 355 CID displacement on SBC block
• Designed for serious street, strip, and race applications

Manley's proprietary single-operation skirt turning and ring groove machining process ensures precise groove-to-skirt squareness for maximum ring seal and efficiency. This rotating assembly kit simplifies the high-performance engine build process by bundling all critical reciprocating components together with tightly matched tolerances.