Speedmaster®
H Beam 6.735" 2.499" .98" Bronze Bush 4340 Connecting Rod Oldsmobile 400 425 455
Product Information
Specs
| Brand: | Speedmaster |
| Part Number: | PCE274.1059 |
| Part Type: | Connecting Rod |
| Product Line: | H-Beam |
| Connecting Rod Length Center to Center (in): | 6.735 in. |
| Connecting Rod Beam Style: | H-beam Street/Strip |
| Connecting Rod Material: | 4340 Chromoly Steel |
| Connecting Rod Finish: | Shot-peened |
| Wrist Pin Style: | Floating |
| Clearanced for Stroker: | Yes |
| Cap Retention Style: | Through-bolt |
| Connecting Rod Bolt Brand: | PCE |
| Connecting Rod Bolt Diameter: | 7/16 in. |
| Connecting Rod Bolt Material: | Chromoly steel |
| Fastener Yield Strength (psi): | 200,000 psi |
| Connecting Rod Bolt Head Style: | 12-point |
| Approximate Connecting Rod Weight (g): | 839g |
| Rod Journal Diameter (in): | 2.499 in. |
| Big End Bore Diameter (in): | 2.6252 in. |
| Pin End Bore Diameter (in): | 0.980 in. |
| Big End Width (in): | n/a |
| Advertised Horsepower Rating (hp): | 850 hp |
| Advertised RPM Rating: | 7,500 rpm |
| Weight Matched Set: | Yes |
| Remanufactured: | No |
| Magnafluxed: | Yes |
| Quantity: | Sold as a set of 8. |
| Tool: | Stroker Combinations |
| Note: | These rods are designed for a narrowed race bearing. We recommend you use CB-542HN Clevite Bearings. |
Description
Speedmaster H-beam connecting rods are one of the strongest connecting rods available. Speedmaster H-beam connecting rods are perfect for supercharged and nitrous applications. These rods incorporate a special doweled cap for specific cap-to-rod alignment and are profiled with extra clearance for stroker applications. Speedmaster H Beam Street / Strip connecting rods are manufactured from aircraft quality 4340 chromoly steel. The rods are x-rayed and ultrasonically tested with all surfaces shot peened and stress relieved.
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.