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Instruction Sheets for Part Number SUM-R2436L8983
Summit Racing™ Pro LS 5.7L Rotating Assemblies SUM-R2436L8983
Part Number: SUM-R2436L8983
Summit Racing™ Pro LS 5.7L Rotating Assemblies
Pro LS 4340 Rotating Assembly, 346 Cid., 3.898 bore, 3.622 stroke, 24X, 6.125 rod, 3cc dome, 11:1 @ 65cc, 10.6:1 @ 68cc, File-Fit Rings, H Bearings
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Estimated Ship Date: Monday 10/19/2026 Would you rather pick it up?
Kit/Combo Contents
Clevite Engine Parts CB-663HN - Clevite H-Series Rod Bearings
Rod Bearing, H Series, Standard Size, TM-77, Chevy, Small Block, Each
Kit Item Quantity: 8
Clevite Engine Parts MS-2199H - Clevite H-Series Main Bearings
Main Bearings, H Series, 1/2 Groove, Standard Size, Tri Metal, Chevy, 4.8, 5.3, 5.7L, Set of 5
Kit Item Quantity: 1
Summit Racing SUM-136SN9035STD - Summit Racing™ Pro LS Piston Rings
Piston Rings, Gas Nitrided Steel Top, Martensitic Ductile Napier Second, Std. Tension Oil, File Fit for 3.898 in. Bore, 1.2mm, 1.2mm, 3.0mm, Set
Kit Item Quantity: 1
Summit Racing SUM-180LS362224X - Summit Racing™ Pro LS Crankshafts
Pro LS 4340 Forged Steel Crank, 3.622 Stroke, 24X Reluctor, Lightened Rod Journals and Gun-drilled Mains, Std. 6-bolt Flange, Internal balanced, LS1
Kit Item Quantity: 1
Summit Racing SUM-2999273898-3 - Summit Racing™ Pro LS Forged Pistons
Pro LS 2618 Forged Piston, 3.898 bore, 1.299 C.H., 3cc mini dome, Std. Stroke, 6.125 Full-float Rod, NA/Boost/Nitrous, Coated, 5.7L LS1 LS6, Set of 8
Kit Item Quantity: 1
Summit Racing SUM-LS6125927 - Summit Racing™ Pro LS Connecting Rods
Pro LS 4340 Forged Steel H-Beam Connecting Rod, 6.125 in. Length, .927 Floating Pin, ARP 2000 7/16 in. 12 pt. Bolts, Stroker Clearanced, LS1, Set of 8
Kit Item Quantity: 1
Overview
Brand:
Manufacturer's Part Number:
SUM-R2436L8983
Part Type:
Product Line:
Summit Racing Part Number:
SUM-R2436L8983
Actual Engine Displacement:
5.7L/346
Rear Main Seal Style:
1-piece
Bore (in.):
3.898 in.
Bore (mm):
99.000mm
Engine Stroke (in.):
3.622 in.
Balanced:
No
Piston Material:
Forged aluminum
Piston Style:
Dome, with two valve reliefs
Harmonic Balancer Included:
No
Flexplate Included:
No
Flywheel Included:
No
Pistons Included:
Yes
Piston Head Volume (cc):
-3.00cc
Wrist Pin Style:
Press-fit or floating
Piston Rings Included:
Yes
Piston Ring Facing Material:
Nitride
Piston and Ring Oversize (in.):
Stock
Piston and Ring Oversize (mm):
Stock
Crankshaft Included:
Yes
Crankshaft Material:
Forged 4340 steel
Engine Balance:
Internal
Connecting Rods Included:
Yes
Connecting Rod Length Center to Center (in.):
6.125 in.
Connecting Rod Material:
Forged 4340 steel
Connecting Rod Beam Style:
H-beam
Rod Bearings Included:
Yes
Rod Bearing Undersize (in.):
Stock
Rod Bearing Undersize (mm):
Stock
Main Bearings Included:
Yes
Main Bearing Undersize (in.):
Stock
Main Bearing Undersize (mm):
Stock
Cam Bearings Included:
No
Gaskets Included:
No
Oil Pump Included:
No
Camshaft Included:
No
Lifters Included:
No
Timing Chain and Gears Included:
No
Plastigage Included:
No
Assembly Lubricant Included:
No
Quantity:
Sold as a kit.
Notes:
6-bolt flange and standard snout for factory wet sump engines, except 1999-2000 thick flange LQ4. Optional thick tool steel pin upgrade recommended at 1,000 hp boosted or 300+ nitrous. Dual 3/16 keyway, Woodruff key not included, re-use factory or use NAL-12561513 rear and add SUM-161000 front for blower balancers. Always clean with mineral spirits and brake-clean oil gallery with 1/4 in. engine brush PIO-4501.
Summit Racing™ Pro LS 5.7L Rotating Assemblies
Summit Racing™ Pro LS 5.7L forged rotating assemblies provide industry-leading fit, finish, and durability at an affordable price. These kits are tested to over 1,200 hp in turbo applications. They're available in a wide range of fitment and performance options.
Standard features and specs may include:
* 4340 forged steel crank
* Core hardened to optimum strength, tempered, and nitride hardened
* Lightening rod journals, gun-drilled mains, and profiled counterweights for better engine acceleration
* Maximum journal tolerances of +/- .0001 to ensure consistent bearing clearance
* Straight-shot oiling for maximum oil film strength at the maximum load angle
* 4340 forged H-beam connecting rods
* Designed for 5,000 ft./min. average piston speed in street and drag applications
* 7/16 ARP 2000 rod bolts with 200,000 psi tensile strength; dual ribbed caps for maximum strength
* Added stroker clearance and balanced to within +/- 1 gram per end
* Full-floating and precision-honed in the USA to +/- .0001 in.
* 2618 forged aluminum pistons
* Ultra-modern 2618 alloy forgings for boost and nitrous with maximum ring land thickness
* Pressure-fed pin oiling with durable chromium steel wrist pins
* Specially profiled and coated piston skirts for stroker applications with tight piston-to-wall clearance
* Generous valve reliefs for extra piston-to-valve clearance accommodate cathedral and rectangle heads
* Premium steel piston rings
* Steel top rings designed for maximum life with boost and nitrous
* File-fit rings for maximum ring seal, reduced friction, and tensions optimized for wet sump engines
* Martensitic ductile Napier-hook second rings for strength and maximum oil control
* Premium main and rod bearings
* Clevite H-bearings are designed for high-rpm operation in racing applications
* Tri-metal bearings designed with high bearing crush for maximum retention
* Medium eccentricity shells with precision wall tolerance of +/- .00015 in.
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