This is aFe's Magnum FLOW Inverted Replacement Air Filter - the IRF - with oil-free Pro DRY S media, for 2003-2024 Dodge and Ram trucks running the 5.9L and 6.7L Cummins inline-six diesel. The inverted construction is what distinguishes it: the element is built with 100% polyurethane on all four sides for an airbox that seats the filter the other way up, and it uses two layers of progressively finer mesh synthetic media rather than the three-layer stack in aFe's standard OE replacement panel.
Being a dry filter, it needs no oil at service time, so there is no risk of over-oiling a mass airflow sensor. It is washable and reusable through multiple cleaning cycles, and the tall, open, evenly spaced pleats hold a lot of dust before airflow suffers, which stretches the interval between cleanings. An integrated urethane bump seal gives a leak-free fit in the housing over the filter's life. It drops into the factory airbox with no modification and no tune. One fitment note from aFe: this filter does not fit vehicles equipped with the RAM Active Air System - check your truck before ordering. aFe states this product does not require a CARB EO number. If you want the standard-orientation OE replacement panel with a foam pre-filter instead, that is part number 31-10102.
- Inverted Replacement Filter (IRF) construction - 100% polyurethane on all four sides
- Pro DRY S media - oil-free, no oiling at service, no risk to the MAF sensor
- Two layers of progressively finer mesh synthetic media
- Washable and reusable for multiple cleaning cycles
- Tall, open, evenly spaced pleats for dust-holding capacity and longer service intervals
- Integrated urethane bump seal for a tight, no-leak fit
- Outflows the stock paper filter
- Direct drop-in replacement in the factory airbox - no modification and no tune required
- Covers 2003-2024 Dodge / Ram diesel trucks with the 5.9L and 6.7L Cummins inline-six
- Does NOT fit vehicles equipped with the RAM Active Air System
- aFe states this product does not require a CARB EO number
Specifications
| Type | Inverted Replacement Filter (IRF) |
| Media Type | Pro DRY S - two layers of progressively finer mesh oil-free synthetic media |
| Construction | 100% polyurethane on all four sides with an integrated urethane bump seal |
| Direct Fit | Yes - drops into the factory airbox, no modification. Does not fit vehicles with the RAM Active Air System |
| Tune Required | No |
| Emissions Status | Does not require a CARB EO number |
| Part Number | 31-80102 |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2003,2005-2010 | Dodge | Ram 2500 | Laramie |
| 2003-2010 | Dodge | Ram 2500 | SLT |
| 2006-2007 | Dodge | Ram 2500 | Sport |
| 2003-2010 | Dodge | Ram 2500 | ST |
| 2008-2010 | Dodge | Ram 2500 | SXT |
| 2010 | Dodge | Ram 2500 | TRX |
| 2006-2007 | Dodge | Ram 2500 | TRX4 |
| 2003-2010 | Dodge | Ram 3500 | Laramie |
| 2003-2010 | Dodge | Ram 3500 | SLT |
| 2006-2007 | Dodge | Ram 3500 | Sport |
| 2003-2010 | Dodge | Ram 3500 | ST |
| 2008-2009 | Dodge | Ram 3500 | SXT |
| 2007 | Dodge | Ram 3500 | TRX4 |
| 2013-2024 | Ram | 2500 | Big Horn |
| 2011-2024 | Ram | 2500 | Laramie |
| 2014-2015 | Ram | 2500 | Laramie Limited |
| 2011-2021 | Ram | 2500 | Laramie Longhorn |
| 2016-2024 | Ram | 2500 | Limited |
| 2021-2024 | Ram | 2500 | Limited Longhorn |
| 2013-2015,2019-2024 | Ram | 2500 | Lone Star |
| 2012-2016 | Ram | 2500 | Outdoorsman |
| 2019-2023 | Ram | 2500 | Power Wagon |
| 2023-2024 | Ram | 2500 | Rebel |
| 2011-2018 | Ram | 2500 | SLT |
| 2024 | Ram | 2500 | Special Service |
| 2011-2013 | Ram | 2500 | ST |
| 2013-2024 | Ram | 2500 | Tradesman |
| 2013-2024 | Ram | 3500 | Big Horn |
| 2011-2024 | Ram | 3500 | Laramie |
| 2014-2015 | Ram | 3500 | Laramie Limited |
| 2011-2020 | Ram | 3500 | Laramie Longhorn |
| 2016-2024 | Ram | 3500 | Limited |
| 2021-2024 | Ram | 3500 | Limited Longhorn |
| 2013-2015,2017,2019-2022 | Ram | 3500 | Lone Star |
| 2011-2024 | Ram | 3500 | SLT |
| 2024 | Ram | 3500 | Special Service |
| 2011-2013 | Ram | 3500 | ST |
| 2013-2024 | Ram | 3500 | Tradesman |
Shipping
- In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Backordered items ship as soon as stock lands — contact us for lead times.
- 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-day returns on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
- Installed or used parts can’t be returned — confirm fitment before you install.
- Special orders and custom items are final sale.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Refund Policy
