HIGH DEMAND ALERT: Shipping may be slightly delayed!
Thank you for making our Black Friday Sale such a huge success! Due to the overwhelming demand, some orders placed during the sale are still being processed. If your Black Friday order is pending, rest assured that it will be shipped soon.
For new orders, please note that slight shipping delays may still occur as our team continues working around the clock to fulfill all orders as quickly as possible. We deeply appreciate your patience and support during this busy time. Stock is moving fast, so don’t wait—shop now to secure your favorites!
Thank you for making our Black Friday Sale such a huge success! Due to the overwhelming demand, some orders placed during the sale are still being processed. If your Black Friday order is pending, rest assured that it will be shipped soon.
For new orders, please note that slight shipping delays may still occur as our team continues working around the clock to fulfill all orders as quickly as possible. We deeply appreciate your patience and support during this busy time. Stock is moving fast, so don’t wait—shop now to secure your favorites!
Speedmaster®
Chevy BBC 454 Cast Steel Crankshaft 4.250" 2Pc-Seal External Bal.
Specs
| Brand: | Speedmaster |
| Part Number: | 1-276-021 |
| Part Type: | Crankshafts |
| Rear Main Seal Style: | 2-piece |
| Engine Stroke (in): | 4.250 in. |
| Crankshaft Material: | Cast steel |
| Engine Balance: | External |
| Lightened: | No |
| Requires Narrow Bearings: | See notes below |
| Rod Bearings Included: | No |
| Main Bearings Included: | No |
| Rod Journal Diameter (in): | 2.200 in. |
| Main Journal Diameter (in): | 2.749 in. |
| Minimun Rod Length (in): | 6.385 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. |
| Tool: | Stroker Combinations |
Description
Speedmaster cast crankshafts are perfect for mildly built street engines or just to replace stock crankshafts that have seen better days. These Speedmaster crankshafts are precision-ground and micro-polished to exacting tolerances.
Prop 65 Warning
This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.