Eagle 127104030 LS Competition Rotating Assembly 408 CID 4.000" Stroke 4.030" Bore

Eagle Competition Rotating Assemblies are designed to offer the ultimate strength and reliability at affordable pricing for the most demanding applications. This 127104030 kit features a 4.000" forged 4340 steel crankshaft with 24-tooth reluctor, 6.125" H-beam connecting rods with 7/16" ARP 8740 bolts, forged 4032 ICON -4cc flat top pistons sized at 4.030" bore, plasma-moly file-fit piston rings, and King XP rod and main bearings. This combination creates a 408 cubic inch displacement, perfect for stroking LS2, LQ4, and LQ9 engines.

Kits include high quality components including an Eagle Forged 4340 Steel Crankshaft; Eagle H-Beam Rods; Arias or Mahle Premium Forged Pistons; Hastings Rings; and high performance Clevite or King Bearings. Eagle competition assemblies are recommended for use in racing engines including exotic fuels, nitrous, and forced-induction. The flat top piston design delivers approximately 11.1:1 compression ratio with 72cc cylinder heads, making this an ideal choice for naturally aspirated, nitrous, or boosted performance applications.

This is an unbalanced rotating assembly kit that requires professional balancing by a qualified machine shop before installation. All components are precision-engineered to maximize performance, reliability, and durability in demanding 8-cylinder racing and high-performance street applications.