Diamond Eye Performance

Diamond Eye Performance specializes in high-performance diesel exhaust systems designed specifically for heavy-duty pickup trucks, earning recognition as "The World's Toughest Diesel & Gas Exhaust." With decades of manufacturing expertise from their eastern Oregon facility, Diamond Eye has become the go-to choice for truck owners seeking maximum performance, durability, and value from Ford Powerstroke, Dodge Cummins, and Chevy Duramax diesel platforms.

Ford Powerstroke Diesel Exhaust Systems

Diamond Eye manufactures complete exhaust systems for the full Ford Powerstroke lineup spanning over three decades. The classic 7.3L Powerstroke (1994-2003) receives 4-inch and 5-inch turbo-back and cat-back configurations in both aluminized and T-409 stainless steel construction. The problematic 6.0L Powerstroke (2003-2007) benefits from Diamond Eye's unrestricted exhaust flow, helping reduce exhaust gas temperatures (EGTs) and improve turbo spool. Modern 6.4L (2008-2010) and 6.7L Powerstroke (2011-current) platforms are covered with DPF-back systems that retain factory emissions equipment while maximizing flow after the diesel particulate filter. All Ford systems include mandrel-bent tubing, clamps, hangers, and step-by-step instructions for straightforward installation.

Dodge Ram Cummins Exhaust Kits

Cummins-powered Ram trucks represent Diamond Eye's largest application range, from vintage 5.9L 12-valve mechanicals (1989-1998) through modern 6.7L common-rail platforms (2007.5-current). The legendary 5.9L 24-valve Cummins (1998.5-2007) receives comprehensive turbo-back systems in 4-inch and 5-inch diameters with single or dual exit configurations. These systems are engineered to handle the increased boost and power output from modified Cummins engines while significantly reducing backpressure. The 6.7L Cummins (2007.5+) gets emissions-compliant DPF-back systems for late-model trucks, allowing owners to improve exhaust flow and sound while maintaining legal operation. Diamond Eye's 5-inch systems are particularly popular for heavily modified Cummins builds exceeding 500 rear-wheel horsepower.

Chevy/GMC Duramax Performance Exhausts

Duramax diesel owners choose Diamond Eye for their LB7 (2001-2004), LLY (2004.5-2005), LBZ (2006-2007), LMM (2007.5-2010), and LML (2011-2016) Silverado and Sierra HD trucks. Systems feature 4-inch and 5-inch mandrel-bent construction with cat-back and turbo-back options. Diamond Eye's specialized 3-inch turbo downpipes with thermal wrap can reduce EGTs by up to 150 degrees, critical for maintaining safe temperatures during heavy towing. The "Quiet Tone" downpipe option incorporates an integrated resonator to reduce interior drone while maintaining aggressive exhaust sound under acceleration. Complete kits include all necessary hardware for direct bolt-on installation without modifications.

Premium Materials and USA Manufacturing

Every Diamond Eye exhaust system is manufactured in-house at their modern Oregon facility using heavy-duty 16-gauge aluminized steel or premium T-409 stainless steel construction. Mandrel-bent tubing ensures smooth, unrestricted exhaust flow with no crimping or restrictions found in crush-bent systems. CNC precision machining and extensive quality control guarantee perfect fitment across all vehicle applications. Systems are available with optional mufflers, straight-pipe eliminator pipes, or Diamond Eye's proprietary "Quiet Tone" mufflers that deliver deep diesel tone without excessive drone. Stainless steel exhaust tips in various sizes (4-inch, 5-inch, 6-inch) and finishes (polished, black powder-coat, angle-cut) provide the finishing touch for professional appearance.