AMP Research PowerStep XL | 3-Inch Extended Drop | 2018-2022 Ram 2500/3500 Mega Cab | SKU 77248-01A
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Before ordering, verify your vehicle details, current setup, and SKU with OFAS fitment support so your upgrade matches your build.
Shipping & Delivery
Free shipping is available within the lower 48 U.S. states. Large or heavy items may ship by freight, and delivery timing can vary by warehouse, carrier, and product availability.
Fitment, Shipping & Product Support
The AMP Research PowerStep XL (SKU 77248-01A) is the automatic electric running board with a 3-inch lower stepping surface than the standard PowerStep, purpose-built for the 2018–2022 Ram 2500/3500 Mega Cab. Integrated into a custom rocker rail for a seamless factory-style look. 6063 marine-grade aluminum construction with stainless steel pivot pins. Single weatherproof OEM-quality motor. Anti-pinch technology. Textured slip-resistant step surface. Integrated LED lighting. Plug-and-play installation — no door panel disassembly required. Supports up to 600 lbs per side. 5-year/60,000-mile warranty.
This SKU is specific to the 2018–2022 Mega Cab. Crew Cab and other model years use a different MPN in the PowerStep XL family (77138-01A, 77148-01A, 77158-01A, 77168-01A, 77238-01A) — confirm cab style and year before ordering.
Component Specifications
| Spec | Detail |
|---|---|
| SKU / Part Number | 77248-01A |
| Brand | AMP Research |
| Product Line | PowerStep XL |
| Step Drop | 3 inches lower than standard PowerStep |
| Rail Material | 6063 marine-grade aluminum |
| Pivot Pins | Stainless steel |
| Motor Configuration | Single weatherproof OEM-quality motor per side |
| Step Width | 6 inches |
| Step Length | Cab length |
| Step Surface | Textured, slip-resistant |
| Pinch Protection | Anti-pinch technology |
| Weight Capacity | 600 lbs per side |
| Lighting | Integrated low-profile LED — included |
| Wiring | Plug-and-play module — no door panel removal required |
| Shipping Weight | 104 lbs |
| Shipping Dimensions | 93" L x 13" W x 12" H |
| Warranty | 5-year / 60,000-mile |
| Country of Origin | United States |
| Sold As | Pair |
What Is and Is NOT Included
| Item | Included |
|---|---|
| Driver and passenger PowerStep XL running boards | ✓ |
| Integrated rocker rail housing | ✓ |
| Integrated LED step lights | ✓ |
| Plug-and-play wiring module | ✓ |
| Vehicle-specific installation guide and hardware | ✓ |
PowerStep XL Family — Choose the Correct MPN
| MPN | Years | Cab Style |
|---|---|---|
| 77168-01A | 2010–2017 | Mega Cab |
| 77158-01A | 2011–2017 | Crew Cab (2500/3500); 2011–2012 1500 Crew Cab |
| 77138-01A | 2013–2017 | Crew Cab — diesel |
| 77148-01A | 2013–2017 | 2500/3500 |
| 77238-01A | 2018–2020 (2021 Classic) | Crew Cab |
| 77248-01A (this listing) | 2018–2022 | Mega Cab |
Each MPN is engineered for a specific year and cab combination. Ordering the wrong MPN will not fit — rocker panel length and mounting geometry differ by cab style.
Verified Fitment — 2018–2022 Ram 2500/3500 Mega Cab
| Vehicle | Years | Cab Style | Status |
|---|---|---|---|
| Ram 2500 | 2018–2022 | Mega Cab | ✓ |
| Ram 3500 | 2018–2022 | Mega Cab | ✓ |
| Ram 2500/3500 | 2018–2020 | Crew Cab | ✗ Different MPN required — order 77238-01A |
| Ram 1500 (any year) | — | Any | ✗ Different MPN/platform |
| Ram 2500/3500 | 2023+ | Mega Cab | ⚠️ Not confirmed for this MPN — verify before ordering |
| Ram 2500/3500 | 2017 and older | Mega Cab | ✗ Different MPN required — order 77168-01A |
Critical Compatibility
| Configuration | Notes |
|---|---|
| Ram 2500/3500 Crew Cab | Does not fit this MPN — order 77238-01A for 2018–2020 Crew Cab |
| Ram 1500 | Does not fit — different platform |
| 2023+ Ram 2500/3500 Mega Cab | Not confirmed for this MPN — verify directly with AMP Research before ordering |
| Pre-2018 Ram 2500/3500 Mega Cab | Does not fit — order 77168-01A |
| Frame-mounted rock sliders or chassis bed steps | May interfere with step deployment arc — verify clearance before ordering |
| Aggressive negative wheel offset or oversized tires | Verify front tire clearance against deployment linkage through full steering lock before ordering |
Common Questions
Does this fit a Crew Cab?
No — not this specific MPN. 77248-01A is built for the Mega Cab's rocker panel length and mounting geometry. Crew Cab requires 77238-01A (2018–2020) or an earlier-generation MPN depending on your year. Confirm cab style before ordering.
Does this have dual motors?
No. The PowerStep XL uses a single weatherproof motor per side. Dual motors are a feature of the PowerStep Xtreme (78239-01A), a separate product engineered for extreme climate conditions.
Does this fit a 2023 or newer Ram HD Mega Cab?
Not confirmed. Every authorized MPN-specific source found caps this product at 2022. Verify directly with AMP Research before ordering for a 2023+ truck.
What is anti-pinch technology?
A safety feature that detects resistance during step retraction — if an obstruction is present, the step stops or reverses rather than continuing to close with force against it.
The Obsidian Take
The PowerStep XL (77248-01A) is for the 2018–2022 Ram 2500/3500 Mega Cab owner running a lift who needs a deeper step drop than the standard PowerStep provides — 3 inches lower, integrated rocker rail housing, 600-lb capacity, single motor, anti-pinch protection.
Cab style and model year are both hard requirements here, not soft preferences. This MPN is Mega Cab specific for 2018–2022 only. A Crew Cab or a 2023+ truck needs a different part number in the same product family.
Non-Returnable Notice: Once connected to vehicle power, this electronic plug-and-play system cannot be returned per AMP Research policy. Confirm all fitment metrics before opening electrical components.
Manufacturer Data Disclaimer: Specifications sourced from AMP Research and authorized distributor documentation (RealTruck/Amazon, ampstep.com, Diesel Power Products, XDP, Rudy's Performance Parts, Rack Attack). One non-authorized source was identified and excluded for unreliable fitment claims. Obsidian Forged Auto Supply is an authorized AMP Research dealer. Verify final fitment against your VIN, model year, and cab configuration before ordering. Manufacturer specifications are subject to change without notice.