Speedmaster®
Chevy 350 Complete 4 Bolt Splayed Steel Main Caps (5 Caps)
Product Information
Overview
Speedmaster main caps are precision machined from superior-quality steel. They come available as stock replacements (straight bolt) or with splayed outer bolt holes. These extreme main cap sets consist of all 5 caps including the rear and front cap. Speedmaster main caps improve reliability in highly stressed engines by reducing distortion of the main bearing bores, and increasing the cap's resistance to closing up under high loads.
Specs
| Brand: | Speedmaster |
| Part Number: | PCE289.1018 |
| Part Type: | Main Cap |
| Main Cap Position: | 5-Caps |
| Main Cap Fastener Style: | Angled |
| Main Cap Fastener Quantity: | 4-bolt |
| Main Journal Type: | GM 350 OEM |
| Main Cap Fasteners Included: | No |
| Main Cap Material: | Steel |
| Machine Work Required: | Yes |
| Quantity: | Sold as a set of 5, including rear main cap |
Warranty Information
12-Month Limited Worldwide Warranty
Prop 65 Warning
This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
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.