---
product_id: 54848096
title: "DEMOTOR PERFORMANCEUniversal 7\" Single Diaphragm Chrome Brake Booster and GM Chrome Aluminum Brake Master Cylinder w/Screw Down Style"
brand: "demotor performance"
price: "43702 kr"
currency: ISK
in_stock: true
reviews_count: 1
url: https://www.desertcart.is/products/54848096-demotor-performanceuniversal-7-single-diaphragm-chrome-brake-booster-and-gm
store_origin: IS
region: Iceland
---

# 4 bolt design Universal fit 20% more power DEMOTOR PERFORMANCEUniversal 7" Single Diaphragm Chrome Brake Booster and GM Chrome Aluminum Brake Master Cylinder w/Screw Down Style

**Brand:** demotor performance
**Price:** 43702 kr
**Availability:** ✅ In Stock

## Summary

> 🚀 Stop in Style: Elevate Your Ride's Performance!

## Quick Answers

- **What is this?** DEMOTOR PERFORMANCEUniversal 7" Single Diaphragm Chrome Brake Booster and GM Chrome Aluminum Brake Master Cylinder w/Screw Down Style by demotor performance
- **How much does it cost?** 43702 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/54848096-demotor-performanceuniversal-7-single-diaphragm-chrome-brake-booster-and-gm)

## Best For

- demotor performance enthusiasts

## Why This Product

- Trusted demotor performance brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Easy Installation:** Standard 2-bolt design for hassle-free setup.
- • **Sleek Chrome Finish:** Elevate your ride's aesthetic with a polished look.
- • **Flexible Port Options:** 4-port unit for customizable line mounting.
- • **Versatile Compatibility:** Fits most street rods and hot rods effortlessly.
- • **Unleash Your Stopping Power:** Experience up to 27% more braking efficiency!

## Overview

The DEMOTOR PERFORMANCE Universal 7" Single Diaphragm Chrome Brake Booster and GM Chrome Aluminum Brake Master Cylinder is designed for enthusiasts seeking enhanced braking performance and aesthetic appeal. With a universal fit for various vehicles, this system offers a significant boost in stopping power, making it an ideal upgrade for street rods and hot rods alike.

## Description

DEMOTOR PERFORMANCEUniversal 7" Single Diaphragm Chrome Brake Booster and GM Chrome Aluminum Brake Master Cylinder w/Screw Down Style

## Features

- Universal style, 7" Chrome Brake Booster, Standard 2 bolt brake master cylinder on top
- Has 4 bolts on the bottom that mount to the firewall with 3 3/8" spacing
- The booster will bolt up to most street rods, hot rods, and many other vehicles. It also offers approximately 20% (some say up to 27%) more stopping power.
- This Master Cylinder Fits most GM applications. With a 1" bore, The cap is attached by 2 small screws
- 9/16" and 1/2" ports on both sides of the master cylinder, 4 port unit, so you can mount your lines on either side, will work with any drum/drum, disc/drum or disc/disc setup

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | DEMOTOR PERFORMANCE |
| Brand | DEMOTOR PERFORMANCE |
| Item Weight | 6 pounds |
| Package Dimensions | 13 x 10 x 10 inches |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | BO7SC+MC-F-704C |

## Images

![DEMOTOR PERFORMANCEUniversal 7" Single Diaphragm Chrome Brake Booster and GM Chrome Aluminum Brake Master Cylinder w/Screw Down Style - Image 1](https://m.media-amazon.com/images/I/51Nm3AaVaWL.jpg)
![DEMOTOR PERFORMANCEUniversal 7" Single Diaphragm Chrome Brake Booster and GM Chrome Aluminum Brake Master Cylinder w/Screw Down Style - Image 2](https://m.media-amazon.com/images/I/51ajj6Blz+L.jpg)
![DEMOTOR PERFORMANCEUniversal 7" Single Diaphragm Chrome Brake Booster and GM Chrome Aluminum Brake Master Cylinder w/Screw Down Style - Image 3](https://m.media-amazon.com/images/I/515fpx6sK3L.jpg)
![DEMOTOR PERFORMANCEUniversal 7" Single Diaphragm Chrome Brake Booster and GM Chrome Aluminum Brake Master Cylinder w/Screw Down Style - Image 4](https://m.media-amazon.com/images/I/51wkgrkUIcL.jpg)
![DEMOTOR PERFORMANCEUniversal 7" Single Diaphragm Chrome Brake Booster and GM Chrome Aluminum Brake Master Cylinder w/Screw Down Style - Image 5](https://m.media-amazon.com/images/I/51dbtj2GmwL.jpg)

## Customer Reviews

### ⭐ 1.0 out of 5 stars







  
  
    Master Cylinder Leaks
  

*by J***O on Reviewed in the United States on June 18, 2023*

Finally got project done with new booster and master cylinder installed for the brakes. Everything fit perfect. Went to bleed the brakes and could not get the air out of the system. two quarts of brake fluid later and found the master cylinder was leaking out the back between booster and master- bad seal?? Discovered two days after return date. Nothing better in the automotive world than brand new broke.

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**Shop now:** [https://www.desertcart.is/products/54848096-demotor-performanceuniversal-7-single-diaphragm-chrome-brake-booster-and-gm](https://www.desertcart.is/products/54848096-demotor-performanceuniversal-7-single-diaphragm-chrome-brake-booster-and-gm)

---

*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-01-22*