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Thumbnail Filmstrip of 2019-2021 6.7L Cummins Sinister Diesel Cold Air Intake System SD-CAI-6.7C-19 Images
Engineered specifically for 2019 through 2021 Ram 2500 and 3500 heavy-duty trucks powered by the 6.7L Cummins inline-6 turbo diesel engine, the Sinister Diesel Cold Air Intake System (Part # SD-CAI-6.7C-19) replaces restrictive factory plastic plumbing with high-flow metal components.
Built using durable mandrel-bent aluminum tubing that resists heat soak better than stock plastic boxes, this open-element system delivers an aggressive turbo whistle alongside improved throttle response and faster turbo spool-up. Complete with a washable, reusable high-flow air filter and mounting hardware, this kit carries zero core charge.
Key Features & Benefits
- Mandrel-Bent Aluminum Tubing: Precision CNC-formed piping ensures smooth, unrestricted airflow and rapid heat dissipation.
- Oversized Reusable Filter: High-capacity cleanable cotton media filter captures harmful debris while maximizing airflow volume.
- Enhanced Turbo Spool-Up: Significantly improves throttle response and acceleration for daily driving, heavy towing, or track use.
- Signature Blue Finish: Coated in corrosion-resistant Sinister Blue powder coat for a striking under-hood appearance.
- Zero Core Charge: Brand-new outright performance intake system requiring no core deposit or return.
Technical Specifications
- Manufacturer / Brand: Sinister Diesel
- Manufacturer Part Number / SKU: SD-CAI-6.7C-19
- Product Type: Open-Element Cold Air Intake Performance System
- Filter Element Type: Oversized Washable & Reusable Cotton Gauze Media
- Tube Material: CNC Mandrel-Bent Aluminum
- Truck Compatibility: 2019–2021 Ram 2500 / 3500 Heavy Duty
- Engine Platform: 6.7L Cummins Inline-6 Turbo Diesel
- Core Requirement: None
- Warranty: Sinister Diesel 1-Year Limited Warranty
Vehicle Fitment & Technical Installation Notes
- 2019–2021 Ram 2500 / 3500 – 6.7L Cummins Diesel
- Installation Tip: Designed for a straightforward drop-in installation utilizing basic hand tools. Ensure all silicone couplings and heavy-duty clamps are tightened evenly to prevent unmetered air leaks. Note: This product is not CARB compliant and is restricted from sale or use in California.
Engineered specifically for 2019 through 2021 Ram 2500 and 3500 heavy-duty trucks powered by the 6.7L Cummins inline-6 turbo diesel engine, the Sinister Diesel Cold Air Intake System (Part # SD-CAI-6.7C-19) replaces restrictive factory plastic plumbing with high-flow metal components.
Built using durable mandrel-bent aluminum tubing that resists heat soak better than stock plastic boxes, this open-element system delivers an aggressive turbo whistle alongside improved throttle response and faster turbo spool-up. Complete with a washable, reusable high-flow air filter and mounting hardware, this kit carries zero core charge.
Key Features & Benefits
Mandrel-Bent Aluminum Tubing: Precision CNC-formed piping ensures smooth, unrestricted airflow and rapid heat dissipation.
Oversized Reusable Filter: High-capacity cleanable cotton media filter captures harmful debris while maximizing airflow volume.
Enhanced Turbo Spool-Up: Significantly improves throttle response and acceleration for daily driving, heavy towing, or track use.
Signature Blue Finish: Coated in corrosion-resistant Sinister Blue powder coat for a striking under-hood ap[...]
Engineered specifically for 2019 through 2021 Ram 2500 and 3500 heavy-duty trucks powered by the 6.7L Cummins inline-6 turbo diesel engine, the Sinister Diesel Cold Air Intake System (Part # SD-CAI-6.7C-19) replaces restrictive factory plastic plumbing with high-flow metal components.
Built using durable mandrel-bent aluminum tubing that resists heat soak better than stock plastic boxes, this open-element system delivers an aggressive turbo whistle alongside improved throttle response and faster turbo spool-up. Complete with a washable, reusable high-flow air filter and mounting hardware, this kit carries zero core charge.
Key Features & Benefits
- Mandrel-Bent Aluminum Tubing: Precision CNC-formed piping ensures smooth, unrestricted airflow and rapid heat dissipation.
- Oversized Reusable Filter: High-capacity cleanable cotton media filter captures harmful debris while maximizing airflow volume.
- Enhanced Turbo Spool-Up: Significantly improves throttle response and acceleration for daily driving, heavy towing, or track use.
- Signature Blue Finish: Coated in corrosion-resistant Sinister Blue powder coat for a striking under-hood appearance.
- Zero Core Charge: Brand-new outright performance intake system requiring no core deposit or return.
Technical Specifications
- Manufacturer / Brand: Sinister Diesel
- Manufacturer Part Number / SKU: SD-CAI-6.7C-19
- Product Type: Open-Element Cold Air Intake Performance System
- Filter Element Type: Oversized Washable & Reusable Cotton Gauze Media
- Tube Material: CNC Mandrel-Bent Aluminum
- Truck Compatibility: 2019–2021 Ram 2500 / 3500 Heavy Duty
- Engine Platform: 6.7L Cummins Inline-6 Turbo Diesel
- Core Requirement: None
- Warranty: Sinister Diesel 1-Year Limited Warranty
Vehicle Fitment & Technical Installation Notes
- 2019–2021 Ram 2500 / 3500 – 6.7L Cummins Diesel
- Installation Tip: Designed for a straightforward drop-in installation utilizing basic hand tools. Ensure all silicone couplings and heavy-duty clamps are tightened evenly to prevent unmetered air leaks. Note: This product is not CARB compliant and is restricted from sale or use in California.
5/5 Stars out of 1 Reviews
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Dan (MI) | October 1st, 2025
The cold air intake will keep throwing a under boost code, does not work with a 21 ram cummins,
Proposition 65 Warning Information -
P65Warnings.ca.gov
California Restricted
Fits: 6.7 Cummins 2019-2024
Fits: 6.7 Cummins 2019-2024
Fits: 6.7 Cummins 2019-2024
California Restricted
Fits: 6.7 Cummins 2019-2024
Fits: 5.9|6.7 Cummins 2003-2024
Fits: 6.7 Cummins 2019-2024