Eagle 129344075 Competition Rotating Assembly LS3 378 CID 4.075" Bore 3.622" Stroke

The Eagle 129344075 is a high-performance Competition rotating assembly engineered for Chevrolet LS3 engines with 24-tooth reluctor applications. This complete 378 cubic inch kit delivers the strength and precision needed for all forms of racing including nitrous and forced-induction applications.

Complete Assembly Includes:

• 3.622" forged 4340 steel crankshaft with 24-tooth reluctor ring
• 6.125" H-beam connecting rods manufactured from 4340 steel
• 7/16" ARP 8740 rod bolts for maximum strength and reliability
• Forged 4032 alloy Mahle flat-top pistons with -5.8cc dome volume, 4.075" bore
• Plasma-moly file-fit piston rings (1.0mm, 1.0mm, 2.0mm)
• King XP performance rod and main bearings

Specifications:

• Displacement: 378 cubic inches
• Bore Size: 4.075"
• Stroke: 3.622"
• Rod Length: 6.125"
• Piston Pin Height: 1.304"
• Pin Size: 0.927"
• Ring Package: 1.0mm, 1.0mm, 2.0mm

Important: This assembly is unbalanced and must be balanced by a qualified machine shop before use. Damper and flexplate/flywheel are not included. Designed for LS3 engines with 4.065" standard bore and 24-tooth reluctor applications.