Speedmaster®
Universal Gm Finned Top Aluminum Brake Master Cylinder Chrome [1.000" Bore]
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![Speedmaster® PCE166.1004 Universal Gm Finned Top Aluminum Brake Master Cylinder Chrome [1.000" Bore]](https://product-arena.s3-us-west-1.amazonaws.com/ProcompElectronics/PCE166%20-%20Master%20Cylinders/PCE166.1004/PCE166.1004.jpg?resizeid=224&resizeh=600&resizew=600)
![Speedmaster® PCE166.1004 Universal Gm Finned Top Aluminum Brake Master Cylinder Chrome [1.000" Bore]](https://product-arena.s3-us-west-1.amazonaws.com/ProcompElectronics/PCE166%20-%20Master%20Cylinders/PCE166.1004/PCE166.1004_A.jpg?resizeid=224&resizeh=600&resizew=600)
![Speedmaster® PCE166.1004 Universal Gm Finned Top Aluminum Brake Master Cylinder Chrome [1.000" Bore]](https://product-arena.s3-us-west-1.amazonaws.com/ProcompElectronics/PCE166%20-%20Master%20Cylinders/PCE166.1004/PCE166.1004_B.jpg?resizeid=224&resizeh=600&resizew=600)
![Speedmaster® PCE166.1004 Universal Gm Finned Top Aluminum Brake Master Cylinder Chrome [1.000" Bore]](https://product-arena.s3-us-west-1.amazonaws.com/ProcompElectronics/PCE166%20-%20Master%20Cylinders/PCE166.1004/PCE166.1004_C.jpg?resizeid=224&resizeh=600&resizew=600)
Product Information
Overview
Do you need a replacement master cylinder for your braking system? Speedmaster master cylinders will increase performance and reliability. Speedmaster manufactures these master cylinders from quality materials to ensure proper fitment.
Specs
| Brand: | Speedmaster |
| Part Number: | PCE166.1004 |
| Part Type: | Master Cylinder |
| Master Cylinder Usage: | Brake |
| Master Cylinder Material: | Aluminum |
| Master Cylinder Finish: | Chrome |
| Master Cylinder Bore Size: | 1.000 in. |
| Outlet Quantity: | 2 |
| Outlet Size 1: | ÂÎ in.-20 |
| Outlet Size 2: | 9/16 in.-18 |
| Bowl Design: | Dual |
| Mounting Hole Quantity: | 2 holes |
| Remote Reservoir: | No |
| Reservoir Included: | Yes |
| Reservoir Material: | Aluminum |
| Reservoir Finish: | Chrome |
| Brake Booster Included: | No |
| Master Cylinder Cap Included: | Yes |
| Pushrod Included: | No |
| Mounting Brackets Included: | No |
| Hardware Included: | No |
| Quantity: | Sold individually. |
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.