Diamond Eye K4122S-RP 4" Cat-Back Single Exhaust System 2006-2007 Duramax LBZ Stainless Steel

The Diamond Eye K4122S-RP is a complete 4-inch T409 stainless steel cat-back single exhaust system designed for 2006 and early 2007 Chevrolet and GMC 2500/3500 trucks equipped with the 6.6L LBZ Duramax diesel engine. This universal fit kit includes all parts and pieces to fit all cab and bed lengths, providing a comprehensive solution for upgrading your truck's exhaust performance.

Key Features:

• 4-inch mandrel bent tubing for maximum flow and unrestricted exhaust gases
• T409 stainless steel construction for superior corrosion resistance and longevity
• Single passenger-side exit configuration
• Includes clamps and integrated hangers for straightforward installation
• The -RP designation indicates this is a replacement pipe version (straight pipe/no muffler option)
• Benefits include increased horsepower, better fuel economy, and lower EGTs

If you prefer a muffler option, Diamond Eye's standard muffler features stainless steel construction with a perforated core that delivers a deep tone while reducing exhaust drone. The system ships in multiple pieces in a box approximately 52"x21"x13". Diamond Eye's precision mandrel bending ensures smooth flow transitions throughout the system, maximizing performance gains while maintaining excellent fitment.