Coolant Filtration Sinister Diesel System for 2011-2015 GM Duramax 6.6L LML

Innovative engineering, extensive field testing. Exceptional quality control. Provides longer brake life and performance. Easy Installation, Direct Fit, Perfect Replacement. Offering the quality, reliability, and durability

• Compatibility Notice – Not compatible with trucks equipped with dual alternators; engineered for single-alternator setups only.
• Continuous Bypass Filtration – Diverts and filters small volumes of coolant while the engine runs, capturing casting sand, metal shavings, rust, and deposits to protect your water pump, EGR cooler, and oil cooler.
• CNC-Machined Anodized 6061 Aluminum Block – Durable billet construction with two threaded inlet ports and one outlet port, mounting directly to existing factory holes—no drilling required.
• Pre-Assembled Silicone Hoses & Leak-Proof Fittings – High-strength silicone hoses and fittings are factory tested at twice radiator cap pressure for secure, leak-free connections.
• Structured Maintenance Schedule – Replace the first filter at 500 miles, the second and third at 3,000 miles each, then switch to annual filter changes to keep your cooling system running at peak efficiency.