Upgrade your truck with bold style and functional safety. Westin's 4" PRO TRAXX Oval Nerf Bars offer wide, secure steps, durable steel construction, and easy bolt-on installation—perfect for daily use and rugged performance.
Top Features:
4″ oval black powder-coated steel tubing
4″ wide, non-slip injection-molded step pads
Domed ends with no exposed bolt heads
Factory-style 30° bends for a clean look
No-drill, bolt-on installation with included hardware
3-year limited warranty on black finish
Vehicle Fitment:
2015–2025 Ford F-150 SuperCrew Cab
2022–2025 Ford F-150 Lightning SuperCrew Cab
2017–2025 Ford F-250, F-350, F-450 Super Duty Crew Cab
2017–2025 Ford F-550 Super Duty Crew Cab & Chassis
Physical products may be returned within 30 days for any reason, provided that the product has not been installed and is in brand new, unused condition with the original packaging. Once a product has been installed, it is non-refundable.
Digital Products, such as MPT Tunes and HP Tuners Credits, are not covered by this.
Please see our Refund Policy or contact an MPT Expert for more information.
MPT is proud to offer free shipping on most orders over $149.
Free Shipping applies only to the contiguous United States. Shipping and handling charges will apply to all orders outside the contiguous US, with the buyer being responsible for any duty fees or taxes their home country may charge to import goods.
With Free Shipping, we will choose the best shipping method for the order. We use all major carriers, including USPS, FedEx, UPS, and DHL.
Items not stocked at our location may incur additional lead-time or charges.
Please our Shipping Policy for more information.
Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1986) is a California law that applies to all companies selling products in California. Proposition 65 requires warnings if a product contains any listed chemical present above very low levels that are known to cause cancer, birth defects or other reproductive harm. Proposition 65’s warning standards are among the most stringent in the world. Proposition 65 is not a product safety law, but rather a “right-to-know” law. Businesses are required to provide warnings to comply with Proposition 65. These warnings are required to be in place for all products offered for sale in California.
There are over 800 chemicals on the Proposition 65 list, which is administered by California's Office of Environmental Health Hazard Assessment (OEHHA), a part of the California Environmental Protection Agency. The list includes naturally occurring and man-made chemicals. Proposition 65 warnings can be seen for a wide variety of everyday consumer products, including Automotive Performance products, and warnings can be seen posted throughout California in a variety of establishments such as hotels, restaurants, automobile dealerships/repair shops, and retail stores just to name a few.
To comply with the requirements of Proposition 65, this warning is present on all products sold by MPT.
More detailed information can be found by going to:
https://www.p65warnings.ca.gov/
Westin’s PRO TRAXX 4 Oval Nerf Step Bars (P/N 21‑23945) deliver rugged styling and functionality in a sleek, bolt-on package—perfect for Ford F‑150 SuperCrew trucks.
The PRO TRAXX 4 Oval Nerf Step Bars offer a bold upgrade for trucks, combining a 4″ oval steel tube and wide 4″ injection‑molded polymer step pads to deliver a safer, more stable footing when entering or exiting the vehicle. Featuring 30 factory‑style bends and fully welded domed ends, these bars eliminate exposed bolt heads or end caps that can rust or snag. Designed for effortless bolt‑on installation without drilling on most models, they deliver both on appearance and protection—shielding rocker panels from road debris damage. Built in San Dimas, California, this product merges styling, strength, and smart engineering in one premium package.
4″ oval steel tubing for durability and rugged style
4″ wide injection‑molded polymer step pads with aggressive tread for sure footing
30° factory‑style bends and seamless domed ends—no exposed bolt heads or end caps
Fully welded design prevents moisture intrusion and internal corrosion
Bolt‑on installation with included mounting hardware—no drilling required in most applications
Designed and engineered in California, built for fit and finish quality
Enhances truck appearance with a refined, street‑style profile and sweeping curved ends
Provides a wide, secure step platform for passengers of all ages and footwear types
Protects rocker panels from road‑born impacts and abrasions
Simplifies installation—mount kit included, saving time and effort
Backed by manufacturer warranty: 3‑year limited warranty on black powder coat finish; polished stainless version carries a lifetime limited warranty
Adds resale value and peace of mind with durable, corrosion‑resistant construction
Part Number: 21‑23945
Tubing Diameter: 4″ oval steel
Step Pad Width: 4″ injection‑molded polymer
Finish/Color: Black powder coat on e‑coated steel
Warranty: 3 year limited against defects in materials, workmanship and finish (excludes misuse and road‑hazard damage) or longer for polished stainless steel version with lifetime warranty as noted above
Weight (approx): 61 lbs per pair; oversize shipment may apply
Mounting Style: Rocker‑panel mounted, bolt‑on installation kit included
Easy – Installation is straightforward and user‑friendly. Most kits require no drilling and include all mounting hardware. According to installation documentation and user feedback, setup time can be under one hour per side, making this a simple DIY upgrade with minimal tools and effort.
Compatible with Ford trucks equipped with SuperCrew cabins:
2015–2025 Ford F‑150 SuperCrew Cab Pickup
2022–2025 Ford F‑150 Lightning SuperCrew Cab Pickup
2017–2025 Ford F‑250, F‑350, F‑450 and F‑550 Super Duty Crew Cab Pickups and Cab & Chassis models
Designed specifically to bolt into factory mounting points for these model years, ensuring precise fit and factory‑style integration.
Questions or concerns about this product or to report any description inaccuracies? Contact the MPT Performance experts at (407) 636‑7077 or by email.
MPT is proud to offer free shipping on most orders over $149.
Turnaround Times:
Special Considerations:
Returnable Products:
Refund Amounts:
Non-Refundable Items:
Year | Make | Model | Submodel |
---|---|---|---|
2015-2025 | Ford | F-150 |
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