Build a Better Engine with a Summit Racing™ Pro LS Rotating Assembly

With 227 different combinations available, Summit Racing™ Pro LS Rotating Assemblies comprise the largest selection of LS engine rotating assemblies in the known universe. If you can’t find an assembly that works for you, maybe it’s time to pick another engine to build.

The Pro LS Rotating Assemblies are available for 5.3L, 5.7L, 6.0L, 6.2L, and 7.0L displacements and feature these top-quality components:

Summit Racing™ Pro LS Forged Steel Crankshafts
• 4340 steel alloy
• Choice of standard 3.622 and 4.000 inch strokes with 24X or 58X reluctor wheels
• Core hardened for optimum strength, tempered and nitride-hardened
• Lightened rod journals, gun-drilled mains, and profiled counterweights for lower windage
• Maximum journal tolerances of +/- .0001 inch to insure consistent bearing clearance
• Straight-shot oiling for maximum oil film strength at maximum load angle

Summit Racing™ Pro LS Forged H-Beam Connecting Rods
• 4340 steel alloy
• 7/16 inch ARP 2000 rod bolts are 23% bigger than the factory 9mm bolts
• Dual ribbed caps for maximum strength
• Added clearance for crankshafts up to 4.250 inch stroke to clear standard base circle cams
• Balanced to within +/- 1 gram per end
• Precision-honed in the USA to +/- .0001 inch
• Available lengths: 6.125 inch with .927 pin, 6.098 inch with .945 pin

Summit Racing™ Pro LS Forged Pistons
• 2618 aluminum alloy
• Specially profiled and coated piston skirts for stroker applications with tight piston-to-wall clearances
• Generous valve reliefs for extra piston-to-valve clearance with cathedral and rectangle cylinder heads
• Pressure fed pin-oiling with durable chromium steel wristpins
• Compression ratios for nitrous and turbo/supercharger applications available
• Standard bore and multiple oversizes available
• Made in the USA

Summit Racing™ Pro LS Piston Ring Sets
• Steel top rings designed for maximum life with boost and nitrous
• Martensitic ductile Napier-hook second rings for strength and maximum oil control
• File-fit for maximum ring seal, reduced friction, and optimized tensions for wet-sump engines
• Made in the USA

The Summit Racing Pro LS Rotating Assemblies also include Clevite 77 H-Series main and rod bearings and come non-balanced. Pro LS Piston and Rod Kits and Crank and Rod Kits are also available.

Get the whole scoop on the rotating assemblies in this OnAllCylinders story.

SEE THE PRO LS ROTATING ASSEMBLIES AT SUMMIT RACING