Grand Rock - 2003 & Newer Peterbilt 379 8" Duplex Stack Kit

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Grand Rock - 2003 & Newer Peterbilt 379 8" Duplex Stack Kit The Grand Rock 8" Duplex Stack Kit is designed specifically for 2003 and newer Peterbilt 379 trucks, delivering a precis e fit, durable construction, and a clean, classic exhaust appearance. Engineered for heavy-duty performance, this duplex system provides balanced exhaust flow and reliable operation for demanding on-road and vocational applications. Featuring dual 8-inch exhaust stacks, the kit enhances exhaust routing while maintaining a polished, professional look that complements the iconic Peterbilt 379 design. Built from high-quality materials, the components are constructed to withstand extreme heat, vibration, and harsh road conditions, ensuring long-term durability and consistent performance. The duplex configuration helps evenly distribute exhaust flow, contributing to efficient operation and reduced stress on exhaust components. Designed for straightforward installation, the kit is engineered to integrate seamlessly with factory mounting locations, minimizing downtime and simplifying the installation process. 8PK-9055RF Still looking for the perfect part? Having trouble finding it?Call our product experts at 603-224-7370 and let us lend a hand. Show more