Description
Product Overview
The KB Performance Pistons PRJ100-3 is a high‑quality aluminum piston ring designed for optimal engine performance. Manufactured by KB Performance Pistons, this component weighs just 0.16 ounces and measures 1.7 x 2.5 x 0.1 inches, offering a lightweight yet robust solution for compression sealing. Its precise dimensions match the OEM part number PRJ100-3, ensuring a seamless fit in compatible engines. The ring’s aluminum alloy construction provides excellent heat resistance and reduces friction, contributing to improved fuel efficiency and power output.
Usage
This piston ring is ideal for engine rebuilds, performance upgrades, and routine maintenance on a wide range of automotive applications. Whether you are restoring a classic vehicle or enhancing a modern engine, the PRJ100-3 delivers consistent sealing and durability. It is particularly suited for enthusiasts seeking reliable compression in high‑rpm scenarios, as well as professional mechanics handling replacement engine parts.

Why Choose Us
KB Performance Pistons is renowned for precision engineering and rigorous quality control. Each PRJ100-3 ring undergoes strict testing to meet OEM specifications, guaranteeing a perfect fit and long‑lasting performance. Our commitment to using premium aluminum alloy ensures resistance to wear and thermal deformation, giving you confidence in demanding driving conditions. With a track record of high customer satisfaction, we stand behind the durability and reliability of every product.
Key Features
- Exact OEM fit for seamless installation
- Lightweight aluminum alloy reduces engine friction
- Enhanced heat resistance for high‑performance applications
- Precision‑machined dimensions ensure reliable compression
- Backed by KB Performance Pistons’ quality assurance program
FAQ
What engines are compatible with the PRJ100-3 ring?
The PRJ100-3 is compatible with engines that use the OEM part number PRJ100-3. Refer to your vehicle’s service manual or contact our support for specific model compatibility.
Can I install the ring myself?
Yes, the ring is designed for straightforward installation with standard piston tools. Ensure the cylinder bore is clean and follow proper torque specifications for optimal results.
What is the benefit of aluminum construction?
Aluminum offers a balance of light weight and strength, reducing overall engine mass while providing excellent heat dissipation and resistance to wear.
Is this ring covered by a warranty?
All KB Performance Pistons products come with a limited warranty against manufacturing defects. Please retain your purchase receipt for warranty claims.
How does this ring improve engine performance?
By providing a precise seal and reducing friction, the PRJ100-3 helps maintain optimal compression, which can lead to smoother power delivery and improved fuel efficiency.




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