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From the brand
Gain critical strength and stability, when you need. Most popular kits install in as little as 45 minutes and require no readjustments.
Authentic Made In USA RoadActive Suspension HD rear leaf spring upgrade by (RAS)RoadActive Suspension. Only listings with the RAS mark are Made In USA with premium rigorously tested and proven for durability since 1998. Be ware of low quality imitations.
Eliminates Squat & Reduces Bounce – Reinforces rear leaf springs by up to 50% for superior towing and hauling performance.
Unmatched Ride Quality & Stability – Maintains a smooth, controlled ride whether loaded or unloaded—no stiff suspension like other add-ons.
No Maintenance, No Adjustments Required – Unlike air-based systems, RAS installs in under an hour and works immediately with zero upkeep.
Proven Performance & Durability – Designed for heavy-duty towing, hauling, and everyday driving with long-lasting reliability.
We offer free next working day delivery on orders over 50$, placed before 4pm Monday to Thursday. Note that next day delivery for orders placed after 4pm on Thursday, up to 4pm Friday, is usually Monday (excluding bank holidays). Estimated delivery for all orders placed over a weekend is Tuesday. Note that due to the size and weight of some products, next working day delivery is not available and additional carriage charges will apply. If you would like to return your goods, we will offer a full refund or exchange within 30 days of purchase. For full details, visit our delivery and returns page.
All of our products come with a standard 1 year manufacturers warranty, however if you would like to discuss extending this warranty, please contact our customer service team email info@marv-us.com. For further warranty information from this specific manufacturer, visit our warranty page.
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