{"product_id":"ras-roadactive-4611-hd-rear-leaf-spring-reinforcement-kit-for-chevy-gmc-1500-3500-heavy-duty-bolt-on-towing-support","title":"RAS RoadActive 4611-HD Rear Leaf Spring Reinforcement Kit for Chevy\/GMC 1500‑3500 — Heavy‑Duty, Bolt‑On Towing Support","description":"\u003cstrong\u003eRAS RoadActive Suspension 4611-HD is a bolt-on rear leaf spring reinforcement kit that improves load carrying, reduces squat and sway, and restores trailer control for compatible Chevy and GMC trucks.\u003c\/strong\u003e\n\n\u003cp\u003eThis heavy-duty RoadActive system is engineered and assembled in North Carolina to support trucks used for towing and hauling. Designed to work with existing leaf springs, the 4611-HD boosts rear spring stiffness without adding air lines, compressors, or ongoing adjustments. It targets drivers who need immediate, maintenance-free improvement in stability and ride quality when their pickup is loaded.\u003c\/p\u003e\n\n\u003ch3\u003eHow will this kit change towing and hauling performance?\u003c\/h3\u003e\n\u003cp\u003eThe 4611-HD increases the effective spring capacity so trucks resist sagging under load and recover faster after bumps. You’ll notice reduced rear-end squat, improved pitch control when accelerating, and fewer sway triggers from crosswinds or heavy trailers. This leads to better steering response and a more confident feel behind the wheel.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStrengthens rear leaf springs up to 50% for added load support.\u003c\/li\u003e\n  \u003cli\u003eReduces rear squat by roughly 2–3 inches in many applications.\u003c\/li\u003e\n  \u003cli\u003eCombines helper spring, sway-dampening, and traction support in one unit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs installation difficult and will it require future upkeep?\u003c\/h3\u003e\n\u003cp\u003eThe kit is designed for bolt-on fitting and can typically be installed in under an hour with standard tools. There are no air bags, compressors, or regular adjustments to manage—the system begins working as soon as it is installed. Because it’s a mechanical, self-contained design, the need for routine maintenance is minimal.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSimple bolt-on hardware, installs in about 45 minutes for most trucks.\u003c\/li\u003e\n  \u003cli\u003eNo air lines, no compressors, and no daily adjustments required.\u003c\/li\u003e\n  \u003cli\u003eDurable construction minimizes long-term servicing needs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich truck models and years will this 4611-HD fit?\u003c\/h3\u003e\n\u003cp\u003eThis RoadActive 4611-HD is made to fit a wide range of Chevy and GMC pickups: 1500 models from 1990 through 2024 and 2500\/3500 models from 1973 through 2010. It is important to check specific exceptions before ordering because some late-model platforms and factory suspension options are incompatible. Confirm fitment against your truck’s model year and rear spring configuration.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible: Chevy\/GMC 1500 (1990–2024) and 2500\/3500 (1973–2010).\u003c\/li\u003e\n  \u003cli\u003eNot compatible with 2022 single rear leaf 1500s, 2015–2018 vehicles with Magneride, or 2025 1500 models.\u003c\/li\u003e\n  \u003cli\u003eAlways verify exact leaf spring type and factory options prior to purchase.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat makes RAS RoadActive different from air bags or other helpers?\u003c\/h3\u003e\n\u003cp\u003eRoadActive’s design focuses on passive, mechanical reinforcement that acts immediately under load without user input. Unlike air systems, it doesn’t change ride height or require pressure management, and it avoids over-stiffening the unloaded ride. The 4611-HD aims to preserve everyday ride comfort while delivering heavier-duty support only when needed.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNo inflation controls—performance is automatic based on load.\u003c\/li\u003e\n  \u003cli\u003eEngineered to improve stability without producing a harsh unloaded ride.\u003c\/li\u003e\n  \u003cli\u003eTested for durability in heavy-use towing and hauling environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The RoadActive 4611-HD is best for Chevy and GMC owners who regularly tow trailers or carry heavy payloads and need a reliable, low-maintenance rear-spring upgrade. It suits drivers who want measurable reductions in squat and sway without adding complex systems, and who require a durable, U.S.-assembled solution for improved control and spring longevity.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this kit make my unloaded ride stiffer?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. The 4611-HD provides added support under load while preserving normal unloaded ride comfort.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I install the 4611-HD myself?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Most owners can bolt it on in about 45 minutes with common hand tools and basic mechanical experience.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"RAS","offers":[{"title":"Default Title","offer_id":48079944384670,"sku":"B09MSKZWZ4","price":888.5,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/ras-roadactive-4611hd-front-packaging.jpg?v=1785776581","url":"https:\/\/northtrailauto.ca\/products\/ras-roadactive-4611-hd-rear-leaf-spring-reinforcement-kit-for-chevy-gmc-1500-3500-heavy-duty-bolt-on-towing-support","provider":"North Trail Auto","version":"1.0","type":"link"}