18in Muffler

The Schoenfeld 18-inch muffler is a direct-flow exhaust silencer engineered for high-performance and street applications requiring effective noise reduction without excessive backpressure. Featuring a 4-inch diameter steel body with 3.5-inch center inlet and outlet connections, this 18-inch muffler delivers balanced sound attenuation while maintaining exhaust scavenging efficiency. Finished in durable black paint, the Schoenfeld 183535 muffler is designed to integrate seamlessly into custom exhaust systems where compact length and reliable performance are priorities.

The 18-inch overall length makes this muffler well-suited for applications with space constraints—rear-engine configurations, low-slung chassis setups, or vehicles where longer muffler cans create ground clearance issues. The 4-inch diameter body provides adequate internal volume for resonance absorption, while the centered 3.5-inch inlet and outlet allow for simple piping alignment in both single and dual-exhaust configurations. Steel construction with black paint finish resists corrosion in typical automotive environments and maintains appearance through road use.

This muffler serves builders and enthusiasts seeking reliable exhaust silencing for street rods, custom hot rods, muscle car restorations, and performance street vehicles. It is particularly effective in applications where aggressive looks and compact packaging are desired without the complexity of turbo or supercharger discharge systems. The Schoenfeld brand is recognized within the performance automotive exhaust market for direct-flow muffler design that prioritizes flow efficiency alongside sound control.

At 5.7 pounds, the muffler is light enough for weight-sensitive builds while maintaining robust steel construction. When selecting an 18-inch muffler, confirm inlet and outlet port sizing (3.5-inch center connections on this unit) matches your existing piping or planned exhaust tubing to ensure proper fit and seal. Total package dimensions of 4 x 4 x 18 inches allow accurate clearance assessment before installation.