Speedmaster®
Chevy SBC 383 ci 6.0" 4.060" 1.100" 0.927" Flat Top Forged Pistons 2.5mm
Product Information
Specs
| Brand: | Speedmaster |
| Part Number: | PCE305.1131 |
| Part Type: | Piston |
| Bore (in): | 4.060 in. |
| Piston Style: | Flat top, with two valve reliefs |
| Piston Material: | Forged Aluminum |
| Compression Distance (in): | 1.100 in. |
| Piston Head Volume (cc): | -4.00cc |
| Max Rod Length (in): | 6.000 in. |
| Wrist Pin Style: | Full Floating |
| Pin Diameter (in): | 0.927 in. |
| Piston Ring Thickness: | 1.5mm x 1.5mm x 2.5mm |
| Quantity: | Sold as a set of 8. |
| Notes: | Requires 0.020" rail spacer support. (PCE308.1002) |
Description
Speedmaster Forged pistons are made from 4032 aluminum alloy for quieter operation and reduced piston to wall clearance. Up to 20% lighter than traditional forged pistons that eliminate harmful stress concentrations for superior strength. Specifically designed for naturally aspirated or moderate nitrous applications.
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.