Pacific Performance Engineering Valve Spring Kits

PPE valve spring kits are engineered to deliver superior valvetrain stability, durability, and high-RPM performance for GM 6.6L Duramax diesel engines. Featuring upgraded conical or tapered valve springs, fully nitrided intake and exhaust valves, Stellite-reinforced exhaust valves, precision chromoly retainers and seats, premium keepers, and high-quality valve seals, these complete kits are designed to eliminate valve float, improve throttle response, and maintain reliable valve control under high boost and heavy-load conditions. PPE's lightweight, high-rate spring design supports demanding towing, competition, and performance applications while providing the strength and longevity needed for engines producing elevated horsepower and boost levels. Whether rebuilding cylinder heads or upgrading for maximum performance, PPE valve spring kits are the backbone of any high-performance diesel build. Show Less