Running Board Extension Arm

You love to beef up your off-road vehicle to improve its performance, and because you want to create the ultimate off-road machine, you invest in a new modification each month. Because you added-a-lift last month, your goal this month is to purchase and install nerf bar extensions so you have an easier time climbing into your ride. Having mistakenly purchased substandard parts in the past, you want to invest in quality automatic running boards that can hold up under intense off-road pressure. Trust to give you access to a great selection of affordable aftermarket parts.

Superior Parts To Enhance Performance
When you lifted your ride, you didn't think about needing to invest in electric steps for your truck. Now you have to jump to climb into your vehicle, so to make it easier, you begin to research extension brackets for nerf bars. From past experience, you know that average parts are a poor investment because they don't last under the pressure of off-roading.

Superior Service To Improve Experience
Finding the right side step extension can be overwhelming because there are several brands and styles available. The experts at 4 Wheel Parts are here to help with any of your off-roading questions, and because we have more than fifty years of experience in the industry, you can trust that we know what we're talking about when you ask us for parts recommendations or installation advice.

We Have Your Side Step Extension Arm
Combining your new running board with an AMP extension arm kit is a wise move. You'll drop your board by two inches, which is perfect when you need to give children and shorter passengers better access to the cabin or need to install a board on a lifted vehicle. These extension arms are custom crafted from 6063 marine grade aluminum, a frequent choice in aluminum door frame, furniture and architectural fabrication for its durability and strength. Not only that, they're made specifically to fit AMP's running boards, supporting up to 600 pounds of weight just like the original products.

Equip Yourself at 4 Wheel Parts
For your truck, SUV, four-wheeler and Jeep exterior parts, there's no better place to shop than 4 Wheel Parts. From door components, bumpers, fenders, tires and wheels to interior parts like oil and air filters, engine components, braking system gear and other essentials, we've got you covered. Locating your gear is simpler than ever, with quick search options, drop-down menus and category links to get to the right items for your make, year, model and sub-model of vehicle.

Get the Best Deals With Our Price Guarantee
4 Wheel Parts is committed with hooking you up with the best gear and the best deals. Thanks to our 90-Day Price Match Guarantee, you don't have to waste time price comparing on every product you're looking for. Just simply buy your components with confidence from 4 Wheel Parts. If you do find your items elsewhere at a lower price from an approved competitor, just let us know. We'll match their deal and refund you the difference. 4 Wheel Parts helps combat this problem by offering you high-quality components from trusted brands such as Bestop. Made from top-quality steel and rubber, our step extensions are designed to withstand the rigorous off-road lifestyle.

Our 100% price-matching policy gives you confidence that you will never overpay for parts when you shop with us, so don't delay. We know that we have the perfect part for you, so shop with us today to beef up your ride and get back to your off-road adventures. Improving the safety of your truck or Jeep with a running board is the smartest choice you can make. When you need your board lower for convenience or to ensure your passengers get surer footing, count on 4 Wheel Parts for a sturdy, superior grade running board extension arm to match.

Running Board Extension Arm

1 Product Groups

    AMP Research PowerStep Extension Arm Kits

    AMP-Research PowerStep Extension Arm

    From $169.99

    1 Products


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    Hopping in and out of your large truck or SUV can be easier and safer by adding a durable running board extension arm to your vehicle's existing power-board linkage arms. The additional leverage added by these extensions can be especially helpful to younger children and even pets as they'll find it easier to step into and out of the vehicle on their own. Automatic extensions that deploy and retract can also ensure decent ground clearance. In addition to functionality, adding a tough and reliable extension arm can improve the exterior appeal of your vehicle with ease. These extensions are ready to install, and our variety of kits can provide you with all the tools necessary to make the improvement.

    Style and Efficiency
    4 Wheel Parts offers truck parts from a variety of notable manufacturers including Amp Research. Your side steps and running boards can find the perfect extension arms they need with the help of our expert staff. They can offer plenty of suggestions and advice on how to lower running boards and which extension arm kits may be best for your rig. Check out our online supplies and easily locate the parts you're looking for with our helpful advanced search options.

    Fast and Easy Orders
    At, we find you the best prices on running board extensions, brackets and more. Ordering your perfect running board lowering kit is easy and affordable thanks to our free shipping offer on qualifying order of $99 or more. If you find an item listed at a lower price by one of our approved competitors, we'll gladly match it. Even within 90 days of your purchase, we'll still match the price with our 100% Price Check Guarantee. We provide some of the best truck parts on the market in our expansive online inventory. Take a look around today and experience the 4 Wheel Parts difference.