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Speedmaster Chevy LS3 426 C.I. Forged Rotating Assembly Kit

Item EK-25-948350
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$2,030.00

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      Product Information

      Features, Description, Q&A

      Features

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      • Brand: Speedmaster
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      • Part Type: Engine Rotating Kit
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      • Actual Engine CID: 426
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      • Bore: 4.065 In.
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      • Engine Stroke: 4.100 In.
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      • Balanced: Internal
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      • Pistons Included: Yes
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      • Piston Rings Included: No
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      • Piston And Ring Oversize: 0.000 In.
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      • Piston Material: Forged 4032 Aluminum Alloy
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      • Piston Style: Flat Top With Two Valve Reliefs
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      • Piston Head Volume: -4.00cc
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      • Wrist Pin Style: Press-Fit Or Floating
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      • Crankshaft Included: Yes
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      • Crankshaft Material: Forged High-Strength Steel, Heat-Treated and Nitride Hardened
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      • Rear Main Seal Style: 1-Piece
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      • Engine Balance: Internal
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      • Connecting Rods Included: Yes
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      • Connecting Rod Material: 4340 Chromoly Steel
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      • Connecting Rod Beam Style: H-Beam Street/Strip
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      • Connecting Rod Length Center To Center: 6.125 In.
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      • Rod Bearing Undersize: Stock
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      • Notes: Crankshaft USA Machined To 10/10 To Ensure No Run Out
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      • Fits
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      Description

      Premium Rotating Assembly. The Speedmaster Chevy LS3 426 C.I. Forged Rotating Assembly Kit offers a high-performance, durable rotating assembly designed for street and race engines. This kit includes forged pistons, connecting rods, and crankshaft engineered to handle increased horsepower and enhance engine reliability, making it an excellent upgrade for enthusiasts building or refreshing a robust LS3 engine with precision machining and superior materials.

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      Construction and Appearance. The assembly features a forged crankshaft made from high-strength steel, which is heat-treated and nitride-hardened to increase wear resistance. The connecting rods are crafted from aircraft-quality 4340 chromoly steel with an H-beam design for superior strength. The pistons are forged from 4032 aluminum alloy, offering lighter weight and enhanced durability. All components are precision machined, shot-peened, stress-relieved, and finished to exacting standards for optimal performance and longevity.

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      Installation. Installation requires advanced mechanical skills and proper engine assembly knowledge. The kit is designed to fit directly without the need for custom drilling or modifications, ensuring a straightforward installation process when paired with compatible engine components.

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      Warranty. This product includes a 12-month limited worldwide warranty covering manufacturing defects.

      Speedmaster PCE290.1159.01

      CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

      Questions & Answers

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