I recently purchased an aftermarket brake master cylinder for my automotive vehicle and I've noticed a significant improvement in braking performance. As a result of using this product, i found that the brake pedal felt more responsive and I was able to brake more smoothly and efficiently. the installation process was relatively easy and straightforward, even for a non-mechanical person like myself. The only downside I encountered was that it was slightly more expensive than some of the other options on the market. Overall, I'm extremely satisfied with the Dorman M630047 Brake Master Cylinder and would highly recommend it to anyone looking to upgrade their brake system..