About Us
Above and Beyond Quality
Quality at a fair honest price. Making a good ring is a Skill.
Making a fine ring is an Art! We strive for perfection in an effort to continue what Frank Bowman started many years ago.
RMJ Machine Worx manufactures custom reproduction piston rings for small and vintage engines.
(custom piston rings, bowman rings)
When you order from us, whether it's your first or tenth time, you become part of our family. We hope that your purchase from us becomes the first of many.
Our Promise
We promise to treat our customers with the honesty and respect they deserve. We pride ourselves on the quality of our workmanship and we want customers to feel satisfaction in choosing RMJ Machine Worx for their piston ring needs. We hope you will be a part of our family for many years to come.
Please remember:
We’re a small family business balancing 80+ hour work weeks and home life. From time to time, we take short breaks from making rings to reset and catch up on life. Thank you for your patience as we deliver the highest quality rings.
Please remember:
Our quality rings are made in America using materials manufactured in America!
Please allow up to 15 days for rings to ship.
Made to Order with Care
Every ring is handcrafted one at a time — we do not keep stock on hand. I balance a full-time job and family life, and make rings after hours. Your patience means a lot and allows me to deliver the highest quality work possible. Thank you for supporting our small business!