Speedmaster®
Ford Fe 390 427 428 Shaft 1.76 Ratio DNA® Aluminum Roller Rocker Arms Set
Product Information
Specs
| Brand: | Speedmaster |
| Part Number: | 1-261-021 |
| Part Type: | Rocker Arm |
| Product Line: | Shaft Mount |
| Rocker Arm Mounting Style: | Shaft |
| Rocker Arm Ratio: | 1.76 |
| Rocker Arm Style: | Full roller |
| Shims Included: | Yes |
| Self-Aligning: | Yes |
| Rocker Arm Body Style: | Standard |
| Rocker Arm Material: | Aluminum |
| Rocker Arm Finish: | Black anodized |
| Quantity: | Sold as a kit. |
Description
Speedmasterª DNA_ roller rockers are the toughest and most innovative rockers we've ever made. Crafted from certified aircraft-quality, heat-treated aluminum, they're matched to massive, precision-ground trunnions for superior durability, and optimized rocker arm geometry evenly distributes the load for maximum strength. DNA_ rocker arms also utilize oversized needle roller bearings for better load distribution and longer service life. Finally, they're black anodized; you'll want to leave your valve covers off! Speedmasterª Aluminum Shaft-Mount Rockers can withstand valve spring loads up to 700Ibs, the extruded body has a tensile strength of over 60,000 PSI.
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.