Speedmaster®
SKU:PCE276.1061.01
Chevy LS 4340 Forged Crankshaft ST-4.100 RJ-2.1 MRL-6.098 RMS-1Pc (10/10)
Chevy LS 4340 Forged Crankshaft ST-4.100 RJ-2.1 MRL-6.098 RMS-1Pc (10/10)
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- Item Condition: Brand New
- Ships within 3 days
- 12-Month Limited Worldwide Warranty

Information
Specifications
| Brand: | Speedmaster |
| Part Number: | PCE276.1061.01 |
| Part Type: | Crankshaft |
| Product Line: | 4340 Forged Steel |
| Rear Main Seal Style: | 1-piece |
| Engine Stroke (in): | 4.100 in. |
| Crankshaft Material: | Forged 4340 Steel |
| Engine Balance: | Internal |
| Lightened: | No |
| Requires Narrow Bearings: | Yes (10/10) |
| Rod Bearings Included: | No |
| Main Bearings Included: | No |
| Rod Journal Diameter (in): | 2.100 in. |
| Main Journal Diameter (in): | LS Standard |
| Minimun Rod Length (in): | 6.098 in. |
| Balancer Bolt Thread Size: | Standard |
| Crankshaft Snout Style: | Standard |
| Quantity: | Sold individually. |
| Notes: | Check the bearing to crank radius clearance. Rod bearings may need to be chamfered or alternatively use narrow rod bearings. USA Machined to 10/10. |
| Tool: | Stroker Combinations |
Speedmaster forged standard weight crankshafts are designed for street or race engines with substantially increased horsepower. Speedmaster crankshafts are precision-ground, heat-treated, shot-peened, inspected, and micro-polished for superior tolerance control. Speedmaster crankshafts are also nitride-hardened for superior wear resistance, have straight-shot and chamfered oil holes, and feature lightening holes in all rod throws. These crankshafts also have a large radius on all journals for improved strength and wear resistance.