Grover is uniquely positioned to deliver for our OEM Customers with dedicated, high volume piston ring manufacturing for their production needs and for low volume, high mix specialty needs for your custom products or aftermarket customers.

5-Step Proven Process

5-Step Process

SureShape™ Technology

What SureShape™ Is

Cylinder Performance Services

Performance Services

Case Studies

Learn More

With stringent quality systems, Grover has a time-tested reputation in the marketplace as a precision manufacturer and key supplier to some of the largest names in the industry. We think that says a lot about our commitment to maintaining the highest quality standards.

We understand that when you use our rings in a product you sell to customers, we become an extension of your organization. This is not something we take lightly. Grover’s Milwaukee, Wisconsin manufacturing facility is one of a select group of companies worldwide that is certified  ISO 9001:2015 certified.

We invest in quality and innovation and employ advanced manufacturing technologies that set the standard for the industry. We are constantly innovating new ways to solve complex problems, reduce lead times, cut costs and evaluate how we can better serve you and your organization.

At Grover, we believe people are the core of everything we do. We invest in our people and empower them to do whatever it takes to ensure you have exactly what you need to remain competitive, meet your goals and keep your company growing.