Diamond Eye 400400 4" Aluminized Steel Round Quiet Tone Exhaust Resonator - No ends (bottom) | Universal

Features:

• Universal fit for 4-inch exhaust systems
• Round body design for smoother exhaust flow
• Aluminized steel resists rust and corrosion
• Built to reduce noise without restricting flow
• No inlet or outlet ends for custom fabrication
• Engineered for aggressive sound and performance
• Perfect for diesel or high-performance setups
• Dyno-tested to maximize power and efficiency
• Backed by a 1-year manufacturer warranty
• Precision built and quality inspected in the USA
• Great option for tuning exhaust tone and volume
• Designed for high-heat, high-boost applications

Let Your Diesel Roar With More Control

If you're after a more aggressive exhaust tone without drowning out the rest of your truck, the Diamond Eye 400400 Quiet Tone Resonator is a solid choice to dial in your sound. Built for diesel performance enthusiasts who want power and presence, this resonator adds a deeper, more refined growl to your setup without killing flow or performance. Its round, aluminized steel body is designed to reduce unwanted rasp while still letting your truck breathe freely. Since this version comes without ends, it’s ideal for custom builds or fabricators looking to integrate it cleanly into a straight pipe section. Whether you’re fine-tuning your exhaust tone or cutting down on drone, it brings the sound and performance into balance. The durable finish resists rust and heat, so it’s built to hold up under serious use. For anyone who wants their truck to sound as strong as it runs, this resonator gets the job done with attitude.

Precision Built For Custom Exhaust Applications

The Diamond Eye 400400 resonator is engineered for serious performance and long-term durability in high-output diesel applications. Designed with a 4-inch inlet and outlet, it features a smooth, round aluminized steel body that integrates easily into universal systems where custom fabrication is required. Because it ships without inlet or outlet ends, it's ideal for installers who prefer welding or fitting it directly into straight pipe sections. The internal structure is fine-tuned to create a deep tone while minimizing excessive drone and harshness in the cab. Diamond Eye uses mandrel-bent tubing and high-quality materials to ensure unrestricted exhaust flow and lasting resistance to heat and corrosion. Every component is thoroughly inspected to meet high manufacturing standards and is backed by a one-year warranty for added peace of mind. Whether you're building a performance system from the ground up or refining an existing setup, this resonator is built to perform and built to last.

Fits: Universal

Notes:

• This is a universal resonator with no inlet or outlet ends
• Requires welding or custom fabrication for installation
• Designed for use with 4-inch exhaust systems
• Round aluminized steel body offers improved durability
• Ideal for diesel performance and high-heat applications
• Produces an aggressive tone while reducing harsh drone
• Does not function as a full muffler replacement
• Best suited for custom or aftermarket exhaust setups
• Made by Diamond Eye, a trusted USA-based manufacturer
• Each unit is precision-tested and quality inspected
• Backed by a 1-year warranty from the manufacturer
• Comes with installation instructions for proper setup