Speedmaster®
Ford 351W Windsor 4340 Forged Crankshaft ST-4.250 M-351C RJ-2.100 Ext
Product Information
Specs
| Brand: | Speedmaster |
| Part Number: | PCE276.1053 |
| Part Type: | Crankshaft |
| Product Line: | 4340 Forged Steel |
| Rear Main Seal Style: | Standard |
| Engine Stroke (in): | 4.250 in. |
| Crankshaft Material: | Forged 4340 Steel |
| Engine Balance: | 28 oz. External |
| Lightened: | No |
| Requires Narrow Bearings: | See notes below |
| Rod Bearings Included: | No |
| Main Bearings Included: | No |
| Rod Journal Diameter (in): | 2.100 in. |
| Main Journal Diameter (in): | 2.749 in. |
| Minimun Rod Length (in): | 6.200 in. |
| Balancer Bolt Thread Size: | Standard |
| Crankshaft Snout Style: | Standard |
| Quantity: | Sold individually. |
| Notes: | For blocks using 351C main bearing sizes such as Ford Racing, Dart, or World blocks. Can also be used in factory Windsor engines with bearing spacer kit. |
| Tool: | Stroker Combinations |
Description
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.
Warranty Information
Prop 65 Warning
Installation Guide
Our AI assistant generates a step-by-step guide for this product — covering installation, maintenance, and troubleshooting.
This AI-generated guide is for general reference only and does not constitute official Speedmaster product documentation. Always verify fitment, torque specifications, and safety requirements before installation.