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| Industry | Automotive |
| Materials | Aluminum, PEEK |
| Surface Finish | As Machined |
| Technology | CNC Machining |
| Final Result | CNC machined parts for the crankshaft and intake systems |
Arco Aria, a seasoned tether car enthusiast, turned to RapidDirect to help with custom machining for his high-performance tether car engines. Arco needed precision-engineered parts for his modified nitro engines, but as a hobbyist with a tight budget, he also sought affordable, small-batch manufacturing solutions. RapidDirect’s online platform and expert support made it the perfect partner for his project.

What's Tether Car?
Tether car racing is a high-speed motorsport where small, custom-built model cars are tethered to a central point. These cars are powered by RC combustion nitro engines and require constant modifications for better performance. Due to the complexity and precision required, many enthusiasts like Arco seek specialized machining services to create custom parts that meet tight tolerance specifications.
Arco needed help with CNC machining parts for his tether car modifications, particularly the crankshaft and intake systems. With RapidDirect, he found a reliable partner who could deliver high-quality, precision parts in small quantities, which was critical for his low-budget but high-performance builds.
Arco used RapidDirect’s easy-to-navigate online quoting platform to get instant quotes and DFM analysis. The ability to track orders and receive updates from his project manager, Olivia, made the entire process fast and transparent. Arco was able to get the custom parts he needed—like custom steel bearing housings—without compromising on quality or speed.
I’ve been in tether car racing for 10 years, and RapidDirect has been great for my engine mods. Their platform is simple to use, quotes are quick, and turnaround times are fast. The parts came out exactly as needed, and Olivia kept me updated through the whole process. H
Thanks to RapidDirect, Arco successfully modified his tether car’s engine, including turning the crankshaft and designing a new intake system for improved efficiency. The parts met his tight tolerance requirements, and the quick turnaround time ensured his projects were ready on schedule.
The cost-effective, small-batch manufacturing allowed Arco to stay within his budget while achieving high-quality results. As a result, he’s set for the 2025 tether car season, with plans to show off his car at the European Championship in Lithuania.
RapidDirect’s ability to handle specialized, low-volume CNC machining with precision and speed made a big difference in Arco’s racing prep.
