Patriot Exhaust H3840 Muffler Insert for Side Pipes, 3.5-Inch Diameter, 12.5-Inch Length

Improve side-pipe sound control with the Patriot Exhaust H3840 Muffler Insert. Designed for use with compatible side-pipe exhaust systems, this insert helps reduce exhaust noise while maintaining a straightforward, functional appearance. Its steel construction provides dependable durability for automotive exhaust applications, and the natural finish offers a clean, unfinished look that can be installed as supplied or finished to suit a custom build.
The Patriot Exhaust H3840 features a 3.5-inch diameter and a 12.5-inch length, making it suitable for side pipes designed to accept this style of internal muffler insert. Its compact, insert-style design allows it to fit inside compatible exhaust tubing without changing the external appearance of the side pipe. This makes it a practical option for restorations, custom vehicles, hot rods, and performance-oriented exhaust projects where sound management is important.
Installation should be completed using compatible side-pipe components and appropriate exhaust hardware. Verify fitment and internal clearance before installation to ensure proper alignment and secure placement. The steel body is built to withstand normal exhaust-system conditions when used in an appropriate application. With its functional design and proven Patriot Exhaust branding, the H3840 is a reliable choice for builders seeking a simple muffler insert for side-pipe systems.

Features:

• Brand: Patriot Exhaust

• Part Number: H3840

• Product Type: Muffler insert for side-pipe exhaust systems

• Diameter: 3.5 inches

• Length: 12.5 inches

• Material: Steel

• Finish: Natural

• Quantity: One muffler insert

• Application: Designed for compatible side pipes