{"product_id":"curt-helux™-coil-spring-gooseneck-pin-box-4-300-lb-pin-weight-20-000-lb-gtw","title":"CURT - Helux Coil-Spring Gooseneck Pin Box - 4,300 lb. Pin Weight - 20,000 lb. GTW - Made in USA - SAE J2638 - #2024044578","description":"\u003cdiv style=\"font-size: 140%; font-weight: 100; margin-bottom: 20px; margin-top: -10px; line-height: 1.6;\"\u003eTow Heavier, Ride Smoother — The Gooseneck Pin Box That Absorbs the Punishment Your RV Shouldn't Take\u003c\/div\u003e\n\u003cdiv style=\"background-color: #f3f4f6; border-left: 4px solid #1d9bf0; padding: 16px; margin-bottom: 16px;\"\u003e\u003cstrong style=\"color: #1d9bf0;\"\u003e✓ ElkhartRVParts.com — Authorized CURT Dealer\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv style=\"background-color: #f3f4f6; border-left: 4px solid #10b981; padding: 16px; margin-bottom: 24px;\"\u003e\u003cstrong style=\"color: #10b981;\"\u003e✓ SAE J2638 Tested | Approved for Lippert RV Frames | Made in USA\u003c\/strong\u003e\u003c\/div\u003e\n\n\u003cp\u003eEvery bump, pothole, and highway expansion joint you drive over sends a jolt from your gooseneck ball straight into your RV's pin box and frame. A rigid pin box transfers all of that energy directly — and over thousands of miles, that repetitive stress cracks welds, loosens hardware, and turns minor road imperfections into major repair bills. The CURT Helux Coil-Spring Pin Box intercepts that punishment at the source, absorbing up to 30% more frame stress than a rigid pin box while delivering a measurably smoother, quieter ride for everyone on board.\u003c\/p\u003e\n\n\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4,300 lb. Pin Weight Capacity\u003c\/strong\u003e — Handles heavy fifth-wheel trailers on gooseneck hitches. Rated to 20,000 lbs. GTW.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoil Spring + Shock Absorber Technology\u003c\/strong\u003e — Proprietary Helux suspension absorbs the road vibration and chucking that rigid pin boxes transfer directly to your frame.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReduces Frame Stress Up to 30%\u003c\/strong\u003e — Measured, real reduction in the repetitive impacts that cause long-term RV frame fatigue, weld cracks, and structural failures.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSmoother Ride for Everything Inside\u003c\/strong\u003e — Less jarring for passengers, pets, dishes, electronics, and every fastener holding your rig together.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAuto-Latching 2-5\/16\" Coupler\u003c\/strong\u003e — Secure, fast hookup on standard gooseneck balls. No fumbling with manual latches at the campground.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eZero Maintenance, Zero Break-In\u003c\/strong\u003e — Ready to tow immediately after installation. Unlike airbag systems, the coil design requires no break-in period and no ongoing maintenance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLippert Frame Approved\u003c\/strong\u003e — Tested and approved for Lippert RV frames without voiding your frame warranty. Rhino Box bolt pattern compatible.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSAE J2638 Safety Tested\u003c\/strong\u003e — Meets the industry standard for fifth-wheel coupling systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMade in USA\u003c\/strong\u003e — Black powder coat finish for long-term corrosion resistance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe difference between a rigid pin box and the Helux is something you feel on the very first trip. With a rigid box, every highway joint gives the whole trailer a sharp kick. On rough roads, you hear things rattling inside. Over thousands of miles, that constant vibration fatigues fasteners, works hinges loose, and eventually shows up as cracked welds or failed components. The Helux coil spring and shock absorber work together to dampen those impacts right at the connection between your truck and trailer — that energy dissipates as heat instead of stress on your RV's structure.\u003c\/p\u003e\n\n\u003cp\u003eThe 4,300 lb. model is the right choice for mid-to-large fifth-wheel trailers running on a gooseneck. The auto-latching coupler is simple to operate and locks without the fumbling that manual-latch designs require. Installation uses the standard Rhino Box bolt pattern and takes a few hours with basic tools. Approved for Lippert frames — which covers the majority of major RV brands. Ships approximately 200 lbs. via LTL freight.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 2024044578 | \u003cstrong\u003eUPC:\u003c\/strong\u003e 612314057955\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e CURT (a Lippert company)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax Pin Weight:\u003c\/strong\u003e 4,300 lbs. | \u003cstrong\u003eMin Pin Weight:\u003c\/strong\u003e 2,450 lbs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGTW Rating:\u003c\/strong\u003e 20,000 lbs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoupler:\u003c\/strong\u003e 2-5\/16\" auto-latching gooseneck ball coupler\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBolt Pattern:\u003c\/strong\u003e Rhino Box compatible\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame Approval:\u003c\/strong\u003e Lippert RV frames\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSafety Standard:\u003c\/strong\u003e SAE J2638\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black powder coat | \u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in USA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShipping Weight:\u003c\/strong\u003e ~200 lbs. (ships LTL freight)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat's Included\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1× CURT Helux coil-spring gooseneck pin box assembly\u003c\/li\u003e\n  \u003cli\u003eMounting hardware, safety chains \u0026amp; installation instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003e⚠️ Freight Shipment:\u003c\/strong\u003e This item ships LTL (~200 lbs.). Freight delivery included. Contact us before ordering with any delivery questions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAlso available:\u003c\/strong\u003e 5,000 lb. version (Part #2024044579) for heavier configurations. \u003ca href=\"\/en-ca\/products\/curt-helux-coil-spring-gooseneck-pin-box-5-000-lb-pin-weight-20-000-lb-gtw\"\u003eView →\u003c\/a\u003e\u003c\/p\u003e\n\n\u003ch2\u003eCompare CURT Helux Gooseneck Pin Boxes\u003c\/h2\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;border:1px solid #e5e7eb;min-width:500px;\"\u003e\n\u003cthead\u003e\u003ctr style=\"background-color:#dc2626;color:white;\"\u003e\n\u003cth style=\"padding:12px;text-align:left;border:1px solid #e5e7eb;white-space:nowrap;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"padding:12px;text-align:left;border:1px solid #e5e7eb;white-space:nowrap;\"\u003eMax Pin Weight\u003c\/th\u003e\n\u003cth style=\"padding:12px;text-align:left;border:1px solid #e5e7eb;white-space:nowrap;\"\u003eMin Pin Weight\u003c\/th\u003e\n\u003cth style=\"padding:12px;text-align:left;border:1px solid #e5e7eb;white-space:nowrap;\"\u003eGTW\u003c\/th\u003e\n\u003cth style=\"padding:12px;text-align:left;border:1px solid #e5e7eb;white-space:nowrap;\"\u003eBest For\u003c\/th\u003e\n\u003cth style=\"padding:12px;text-align:left;border:1px solid #e5e7eb;white-space:nowrap;\"\u003eView\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color:#fef2f2;border-left:3px solid #dc2626;\"\u003e\n\u003ctd style=\"padding:12px;border:1px solid #e5e7eb;\"\u003e\n\u003cstrong\u003eHelux 4,300 lb.\u003c\/strong\u003e\u003cbr\u003e#2024044578\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border:1px solid #e5e7eb;\"\u003e4,300 lbs.\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border:1px solid #e5e7eb;\"\u003e2,450 lbs.\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border:1px solid #e5e7eb;\"\u003e20,000 lbs.\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border:1px solid #e5e7eb;\"\u003eMid-to-large fifth-wheels on gooseneck\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border:1px solid #e5e7eb;white-space:nowrap;\"\u003e\u003cstrong\u003eYou are here\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px;border:1px solid #e5e7eb;\"\u003e\n\u003cstrong\u003eHelux 5,000 lb.\u003c\/strong\u003e\u003cbr\u003e#2024044579\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border:1px solid #e5e7eb;\"\u003e5,000 lbs.\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border:1px solid #e5e7eb;\"\u003e2,850 lbs.\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border:1px solid #e5e7eb;\"\u003e20,000 lbs.\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border:1px solid #e5e7eb;\"\u003eHeaviest fifth-wheels — maximum capacity \u0026amp; headroom\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border:1px solid #e5e7eb;white-space:nowrap;\"\u003e\u003ca href=\"\/en-ca\/products\/curt-helux-coil-spring-gooseneck-pin-box-5-000-lb-pin-weight-20-000-lb-gtw\" style=\"color:#dc2626;font-weight:bold;\"\u003eView Product →\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Curt","offers":[{"title":"Default Title","offer_id":48533732032664,"sku":"2024044578","price":2032.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0346\/2397\/9579\/files\/2024044578_Curt_CURTHeluxCoilSpringGooseneckPinBox4300lbsPinWeight20000lbsCapaci_2_1_1.webp?v=1773943994","url":"https:\/\/elkhartrvparts.com\/en-ca\/products\/curt-helux%e2%84%a2-coil-spring-gooseneck-pin-box-4-300-lb-pin-weight-20-000-lb-gtw","provider":"Elkhart RV Parts","version":"1.0","type":"link"}