Doug's Headers H3843 Auger Style Muffler Insert 3.5 Inch Diameter

The Doug's Headers H3843 is an auger-style muffler insert designed for side tube exhaust applications with 3.5-inch diameter tubing. This universal-fit insert provides effective sound control through its innovative auger design, which eliminates the need for fiberglass packing that can degrade over time.

Key Features:

• Auger-style design provides excellent sound control without fiberglass packing
• Fits 3.5-inch diameter exhaust tubing
• 11-inch overall length for optimal sound dampening
• Steel construction for durability and long-lasting performance
• Reduces exhaust drone while maintaining good exhaust flow
• Universal fit for custom exhaust systems and side pipes

This muffler insert is ideal for reducing unwanted drone and excessive noise in high-performance exhaust systems, particularly popular with Corvette side pipe applications and custom hot rod builds. The auger design features spiral fins that disrupt exhaust flow patterns to reduce noise without the significant back pressure associated with traditional reverse-flow designs. Installation note: Minor grinding of the auger fins may be required to achieve proper fitment depending on the exact internal diameter of your exhaust tubing.