The aFe Magnum FORCE Stage-2 cold air intake for the 6.6L Duramax replaces the factory air box with an open element XLPE housing and a heat soak resistant XLPE intake tube. A 9 in tall, 360 degree radial flow Pro 5R filter on a 5 in flange uses five layers of oiled cotton gauze that can be washed and reused. The system flows 750 CFM at 7 in H2O, 81% more than the factory intake, and dyno testing showed gains of up to +8 hp and +19 lb-ft. It uses the factory mounting points with no cutting, and installation takes roughly 15 minutes.
Specifications
| Type | Cold Air Intake System |
| Series | Magnum FORCE Stage-2 |
| Filter Media | Pro 5R, five-layer oiled cotton gauze, washable and reusable |
| Filter | 9 in tall, 360 degree radial flow, 5 in flange |
| Housing | Open element XLPE |
| Intake Tube | XLPE, heat soak resistant |
| Gains | +8 hp, +19 lb-ft; 750 CFM @ 7 in H2O, 81% more than the factory intake |
| Fitment Notes | 6.6L Duramax diesel (L5P) only; does not fit gas engines |
| What's in the Box |
|
| Install | Factory mounting points, no cutting, about 15 minutes |
| Replacement Filter | 24-91120 (Pro 5R) |
| Engine | V8-6.6L (td) Duramax |
| Hardware Included | Yes |
| Air Flow Gain | 81 Percent |
| Pre-Filter | 28-10033 |
| Air Box Type | Open |
| Heat Shield Included | Yes |
| Tune Required | No |
| Warranty | 2 years on components (original owner) |
| Part Number | 54-12902R |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2017-2019 | Chevrolet | Silverado 2500 HD | High Country |
| 2017-2019 | Chevrolet | Silverado 2500 HD | LT |
| 2017-2019 | Chevrolet | Silverado 2500 HD | LTZ |
| 2017-2019 | Chevrolet | Silverado 2500 HD | WT |
| 2017-2019 | Chevrolet | Silverado 3500 HD | High Country |
| 2017-2019 | Chevrolet | Silverado 3500 HD | LT |
| 2017-2019 | Chevrolet | Silverado 3500 HD | LTZ |
| 2017-2019 | Chevrolet | Silverado 3500 HD | WT |
| 2017-2019 | GMC | Sierra 2500 HD | Base |
| 2017-2019 | GMC | Sierra 2500 HD | Denali |
| 2017-2019 | GMC | Sierra 2500 HD | SLE |
| 2017-2019 | GMC | Sierra 2500 HD | SLT |
| 2017-2019 | GMC | Sierra 3500 HD | Base |
| 2017-2019 | GMC | Sierra 3500 HD | Denali |
| 2017-2019 | GMC | Sierra 3500 HD | SLE |
| 2017-2019 | GMC | Sierra 3500 HD | SLT |
Documents: Installation Instructions (PDF)
Which trucks does this intake fit?
- The 2017-2019 Chevrolet Silverado 2500 HD / 3500 HD and GMC Sierra 2500 HD / 3500 HD with the 6.6L L5P Duramax diesel.
Does it fit the 6.0L gas trucks?
- No. It is built for the 6.6L Duramax diesel only.
How much does it flow?
- 750 CFM at 7 in H2O, 81% more than the factory intake, with gains of up to +8 hp and +19 lb-ft.
What replacement filter does it use?
- The Pro 5R filter is part number 24-91120.
Shipping
- Orders placed before 3 PM EST typically ship the same business day. Larger items ship within 1 to 3 business days.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Special order items follow a lead time we confirm with you individually before the order is committed.
- Backordered items ship as soon as stock lands. Lead times are manufacturer estimates and can change. Contact us for current ETAs.
- Need to cancel? Email us right away. Cancellations are not guaranteed once an order is in process. In-stock orders cancel free before they ship; a 6% fee applies only to confirmed backorders and special orders.
- International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.
Returns
- 30 days from delivery to request and ship back a return on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee on the item price before tax and shipping. Shipping is not refunded in either direction. All waived if the item is defective or we made the error.
- Fitment guaranteed: select your vehicle above, or confirm fitment with us in writing before you order. If the part shows as a fit and it is wrong, the return is on us, even after installation. Otherwise, installed or used parts cannot be returned.
- Final sale: special orders, coilovers, electronics, engine internals, turbochargers, superchargers and turbo kits, unless defective or we sent the wrong item.
- Product images may be representative. The SKU and specifications in the listing are what ships.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Returns & Refunds · Warranty






