Turning a 2004 Mustang Mach 1 piston rod into a custom ring.
When Guillermo reached out to Honest Hands, he had a clear vision. He wanted his wedding ring made from a piston connecting rod pulled from a 2004 Ford Mustang Mach 1. Not a ring inspired by cars. A ring built from one.
Guillermo works at a refinery, spending long shifts in high-temperature conditions. He needed a ring that could withstand the demands of his daily life without losing its look. Shiny or silver wasn’t his style. He wanted something dark, tough, and authentic to who he is.
Together, we settled on a custom ring featuring a black titanium band with a brushed finish and polished beveled edges. For the inlay, Guillermo had a specific vision: a streaky, swirled blend of crushed emerald and sapphire mixed with the connecting rod material, creating what he described as an "oil spill effect." That kind of detail told us everything we needed to know about the ring he was after.
Turning an actual engine component into wearable jewelry takes a different approach than most builds. The connecting rod, likely forged steel, was engineered for the inside of a motor, not a finger. We had to figure out how the material would respond to our tools and how best to work it into the design.
We machined the black titanium band to an 8mm width and cut a centered 1.5mm inlay groove. The connecting rod was processed and incorporated into both the outer inlay and the ring’s inner liner, giving the piece a direct connection to the Mustang on every surface.
The inlay took shape through close collaboration with Guillermo. He knew exactly how he wanted the color to read, not a clean gradient but something with movement and character. We crushed the emerald and sapphire, and blended them with the rod material, working the stones into a swirled pattern that shifted between deep blues and greens. The goal was to capture that organic, iridescent quality of oil as it catches light.
Once the inlay was set, we sealed and coated the materials, then sanded everything down to a smooth, flush finish. The brushed exterior and polished bevels on the black titanium framed the inlay cleanly, creating a sharp contrast between the dark band and the color running through its center.
The finished ring is exactly what a custom build should be: personal, intentional, and built for the life it's about to lead. It looks and feels like it belongs to the person wearing it, and that's the whole point.
At Honest Hands Ring Co., we don’t shy away from unconventional materials, whether they're car parts, beach sand, family gold, or feathers.
If it means something to you, we’ll find a way to build it into a ring you can wear every day.
Got something you want to carry with you? Tell us your story, and let’s make it real.
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