Max out your engine  Optimize with precision!

It’s important to note that consistently high RPMs can lead to increased wear and tear on the engine, while low RPMs might not deliver the power needed for certain tasks. Therefore, a “Custom RPM” would be a balance between these factors, tailored to the specific needs of the engine or situation.

Our Reliable Services

Specializing in Digital Engine Upgrades for Sustainable Performance, Explore safe and effective solutions through our trusted industry partnerships.
Engine Optimization 

Unlock the full potential of your engine with proven upgrades! Our tried-and-tested methods enhance engine performance, increase horsepower, and optimize fuel efficiency

Nizpro Preformance

As the authorized dealer for Nizpro Marine Performance in Sweden, we proudly offer high-quality upgrades for Yamaha outboards ranging from 50hp to 350hp. Our expert team ensures that your engine performs optimally, enhancing both power and fuel efficiency. Nizpro upgrades deliver exceptional results.”

Advanced Diagnostics 

Our team of experts provides professional troubleshooting services and software upgrades to ensure your systems operate efficiently. Whether you’re dealing with performance issues, glitches, or compatibility challenges, our diagnostic solutions are tailored to meet your needs. Trust us to keep your equipment running smoothly.

Comprehensive ECU Troubleshooting and Repair

We specializes in diagnosing and resolving issues related to all types of data boxes. Whether you’re dealing with connectivity problems, data transfer errors, or hardware malfunctions, we’ve got you covered

All questions are welcomed!

Use this form to get in touch, or send us an email at

Name E-mail Message Skicka in

Norra Hamn 3, 633 46 Eskilstuna

About us

At Custom RPM, our passion lies in digital engine development. With a network of well-established partners, we specialize in delivering safe and sustainable upgrades. Whether it’s fine-tuning performance, optimizing fuel efficiency, or enhancing power, we’re committed to excellence. Trust us to elevate your engine experience.”

Why Choose Us?

we’re not just experts; we’re pioneers in digital engine development. Our track record speaks for itself, backed by trusted partnerships with industry leaders like Lundins Marin R&D and Nizpro Marine. Whether you seek cutting-edge performance, fuel efficiency, or reliability, we’re your go-to team. Choose Custom RPM for unmatched expertise and results!


Our seasoned team brings decades of industry knowledge to the table. We’ve honed our expertise through years of hands-on experience, ensuring that our services are not only reliable but also tailored to meet your specific needs. Trust us to navigate the complexities of engine development with precision and dedication.


Quality is at the core of everything we do. Our unwavering commitment ensures that every solution we provide meets the highest standards. From performance upgrades to troubleshooting, expect nothing less than excellence. Count on us for reliable results that exceed expectations.


We prioritize durability. Our services are designed with sustainability in mind, ensuring long-lasting results. From meticulously developed upgrades to eco-friendly practices, we’re committed to minimizing our environmental impact. Trust us for solutions that stand the test of time

Certified dealer

As an authorized dealer of Nizpro Marine products, we bring you cutting-edge solutions for Yamaha outboards. Our certified team ensures that you receive genuine Nizpro upgrades, from ECU reflashing to superchargers. Experience improved fuel economy and engine performance with our trusted offerings.

Take the next step with us!

Do you have questions or want to learn more about how we can assist you? Contact us today, and together, we’ll move forward.”

Upgrades & Repowers

Regarding Upgrades and Repowers the customer takes full responsibility.