Engineered for 3rd Generation (2007.5–2009) and early 4th Generation (2010–2012) Dodge Ram 2500/3500 trucks powered by the 6.7L 24-Valve Cummins turbo diesel, the Sinister Diesel Cold Air Intake System (SD-CAI-6.7C-07) removes factory induction restrictions to maximize airflow into the Holset turbocharger. The factory corrugated intake hose and enclosed baffle box restrict airflow velocity; this system replaces them with a smooth-bore aluminum induction tract that reduces turbo lag and improves throttle response across the entire RPM band.

The system centers on a lightweight, CNC mandrel-bent aluminum tube that maintains uniform diameter through all bends to eliminate internal turbulence. It is paired with an open-top thermal heat shield that seals against the hood liner to isolate incoming air from high under-hood temperatures while drawing ambient air from factory fender channels. Outfitted with a high-flow, reusable blue oiled cotton filter and heavy-duty silicone couplers, this kit provides long-term durability and an aggressive under-hood appearance finished in Sinister's signature metallic blue powder coat.

Key Features & Benefits

• CNC Mandrel-Bent Aluminum Tubing: Smooth internal surface with uniform diameter eliminates flow restrictions and turbulence, maximizing airflow volume and velocity to the turbo compressor.
• Reusable Oiled Cotton Media: Multi-layer oiled cotton filter element captures abrasive dirt and debris while flowing significantly more air than stock paper filters; washable and reusable for the life of the vehicle.
• Thermal Isolation Heat Shield: Heavy-duty powder-coated steel heat shield with top edge weatherstripping seals firmly against the underside of the hood to block radiant engine bay heat.
• Signature Sinister Blue Finish: Durable powder-coated finish provides corrosion and scratch resistance while enhancing engine bay styling.
• Reinforced Silicone Couplers: Includes oil- and heat-resistant silicone boots paired with stainless steel band clamps to eliminate leaks and prevent coupler slippage under heavy boost transitions.
• Factory Sensor Accommodation: Precision CNC-machined sensor bosses accept stock intake air temperature and pressure sensors for plug-and-play installation without triggering check engine lights.

Technical Specifications

• Manufacturer Part Number / SKU: SD-CAI-6.7C-07
• Truck Platform: 3rd Generation (2007.5–2009) & Early 4th Generation (2010–2012) Ram Heavy Duty
• Engine Platform: 2007.5–2012 Dodge Ram 6.7L 24V Cummins Turbo Diesel
• Tubing Material: CNC Mandrel-Bent Aluminum
• Filter Media Type: Multi-Layer Cleanable Oiled Cotton Gauze (Signature Blue)
• Finish: Signature Sinister Blue Powder Coat
• Tuning Required: None (Compatible with Stock ECM Calibration or Custom Tunes)
• Warranty: Sinister Diesel Limited Lifetime Warranty

Vehicle Fitment & Installation Notes

• 2007.5–2009 Dodge Ram 2500 / 3500 (3rd Gen) – 6.7L 24V Cummins Turbo Diesel
• 2010–2012 Ram 2500 / 3500 (4th Gen) – 6.7L 24V Cummins Turbo Diesel
• 2008–2012 Ram 4500 / 5500 Chassis Cab (3rd & 4th Gen) – 6.7L 24V Cummins Turbo Diesel
• Fits Model Years: 2007.5, 2008, 2009, 2010, 2011, 2012
• Fitment Notice: Cross-generation design engineered specifically for 2007.5–2012 6.7L engines. Does not fit 2003–2007 5.9L Cummins or 2013+ 6.7L Cummins trucks (which utilize dual-inlet Ram Active Air boxes).
• Installation Tip: When installing the rubber bulb seal along the upper edge of the heat shield, trim any excess length squarely to ensure a uniform, airtight seal against the hood insulation when closed.