Diamond Eye 261001 4-Inch Stainless Steel Downpipe 1994-2002 Dodge Cummins 5.9L

The Diamond Eye 261001 is a 4-inch T409 stainless steel downpipe designed specifically for 1994-2002 Dodge Ram 2500/3500 trucks equipped with the 5.9L Cummins diesel engine. This performance downpipe replaces the restrictive factory 3-inch exhaust with a larger diameter 4-inch mandrel-bent pipe to improve exhaust flow, reduce backpressure, and enhance overall engine performance.

Key Features:

• 4-inch mandrel-bent T409 stainless steel construction for durability and corrosion resistance
• Direct bolt-on replacement for factory downpipe
• Compatible with all cab and bed length configurations
• Fits both 12-valve (1994-1998) and 24-valve (1998.5-2002) Cummins engines
• Designed for stock turbo applications
• Utilizes factory V-band mounting connection at turbo outlet

This downpipe is precision-manufactured using CNC mandrel bending technology to ensure smooth bends and consistent diameter throughout, maximizing exhaust flow. The larger 4-inch diameter significantly improves exhaust scavenging over the factory 3-inch system, which can result in improved throttle response, reduced exhaust gas temperatures, and modest power gains when combined with other performance upgrades.

Application Note: This downpipe is engineered for vehicles with stock turbochargers. Some minor bracket modification may be required during installation to accommodate the larger diameter tubing at the bellhousing mounting point.