Details
Product Information
The aFe Magnum FORCE Stage-2 cold air intake for the 6.6L LML Duramax combines a 3-1/2 in black powder-coated aluminum intake tube with an 18 gauge heat shield that fits the factory air box. A 7-1/2 in Pro DRY S filter uses three layers of oil-free synthetic media that can be washed and reused without oiling. The system increases airflow by 32% and is rated at up to +13 hp and +16 lb-ft. It is covered by CARB Executive Order D-550-18, and the EO label supplied in the kit goes on or near the intake for smog inspection.
Specifications
| Type | Cold Air Intake System |
| Series | Magnum FORCE Stage-2 |
| Filter Media | Pro DRY S, three-layer oil-free synthetic, washable and reusable |
| Filter | 7-1/2 in |
| Intake Tube | 3-1/2 in aluminum, black powder coat |
| Heat Shield | 18 gauge, fits the factory air box |
| Gains | +13 hp, +16 lb-ft; 32% more airflow |
| Fitment Notes | 6.6L LML Duramax diesel only |
| What's in the Box |
|
| Replacement Filter | 21-91040 (Pro DRY S) |
| Emissions | Covered by CARB Executive Order D-550-18 for the 2011-2016 Chevrolet Silverado HD and GMC Sierra HD 6.6L |
| Engine | V8-6.6L (td) Duramax |
| Filter Color | Gray |
| Hardware Included | Yes |
| Air Flow Gain | 48 Percent |
| Pre-Filter | 28-10133 |
| Warranty | 2 years on components (original owner) |
| Part Number | 51-32322 |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015-2016 | Chevrolet | Silverado 2500 HD | High Country |
| 2011-2016 | Chevrolet | Silverado 2500 HD | LT |
| 2011-2016 | Chevrolet | Silverado 2500 HD | LTZ |
| 2011-2016 | Chevrolet | Silverado 2500 HD | WT |
| 2015-2016 | Chevrolet | Silverado 3500 HD | High Country |
| 2011-2016 | Chevrolet | Silverado 3500 HD | LT |
| 2011-2016 | Chevrolet | Silverado 3500 HD | LTZ |
| 2011-2016 | Chevrolet | Silverado 3500 HD | WT |
| 2015-2016 | GMC | Sierra 2500 HD | Base |
| 2011-2016 | GMC | Sierra 2500 HD | Denali |
| 2011-2016 | GMC | Sierra 2500 HD | SLE |
| 2011-2016 | GMC | Sierra 2500 HD | SLT |
| 2011-2014 | GMC | Sierra 2500 HD | WT |
| 2015-2016 | GMC | Sierra 3500 HD | Base |
| 2011-2016 | GMC | Sierra 3500 HD | Denali |
| 2011-2016 | GMC | Sierra 3500 HD | SLE |
| 2011-2016 | GMC | Sierra 3500 HD | SLT |
| 2011-2014 | GMC | Sierra 3500 HD | WT |
Documents: Installation Instructions (PDF)
Which trucks does this intake fit?
- The 2011-2016 Chevrolet Silverado 2500 HD / 3500 HD and GMC Sierra 2500 HD / 3500 HD with the 6.6L LML Duramax diesel.
Is it legal in California?
- Yes. It is covered by CARB Executive Order D-550-18 for the 2011-2016 Silverado HD and Sierra HD 6.6L; keep the supplied EO label on or near the intake for smog inspection.
Does the Pro DRY S filter need oil?
- No. The three-layer synthetic media is oil-free and can be washed and reused.
What replacement filter does it use?
- The Pro DRY S filter is part number 21-91040.
Shipping
- In stock orders typically 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






