{"product_id":"synergy-jeep-jl-jt-heavy-duty-ball-joints-knurled-1-upper-1-lower","title":"Synergy Jeep JL\/JT Heavy Duty Ball Joints Knurled (1 Upper\/1 Lower)","description":"\u003cp class=\"p1\"\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e: 4170-04\u003c\/p\u003e\n\u003ch4 class=\"p1\"\u003eHeavy Duty Ball Joint Kit for Jeep Wrangler JL, JLU, and Gladiator JT\u003c\/h4\u003e\n\u003cp class=\"p1\"\u003eSynergy Manufacturing Heavy Duty Ball Joint Kit, the ultimate upgrade for off-road enthusiasts and daily drivers alike. Engineered to replace the factory’s inferior plastic nylon bearing design, these fully greaseable, metal-on-metal ball joints deliver unmatched durability, longevity, and precision steering. Say goodbye to steering wander, play, and premature wear caused by stock ball joints, especially on lifted Jeeps with larger tires. Designed specifically for 2018+ Jeep Wrangler JL, JLU, and 2020+ Gladiator JT, this kit is a must-have for tackling rugged trails or enhancing on-road stability.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eSynergy’s Heavy Duty Ball Joints feature a proven metal-on-metal bearing design that eliminates the problematic nylon inner liner found in OEM ball joints, offering a significantly larger bearing surface for extended lifespan. Crafted from heat-treated 4140 Chromoly steel for the stud and 1045 high-carbon alloy steel for the housing, these ball joints provide maximum strength and reliability. The sintered graphite and oil-impregnated bronze race ensures a smooth, durable bearing surface, while industrial-grade nitro-butyl rubber (NBR) dust boots protect against trail debris and resist tearing during maintenance. Compatible with all aftermarket axle shafts, including RCVs, this kit requires no modifications for a seamless bolt-on installation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eWhether you’re conquering rocky terrains or cruising highways, the Synergy Heavy Duty Ball Joint Kit corrects sloppy steering, reduces wear, and enhances road manners. Backed by over 5 years of development and 500,000+ test miles, these ball joints are built to withstand the toughest conditions. Pair them with Synergy’s High-Performance Grease (4119) and Heavy Duty Steering Kit for a bulletproof front-end setup. Upgrade today and experience the Synergy difference—your Jeep deserves the best!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003ePart Numbers:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003e\n\u003cstrong\u003e4170-01\u003c\/strong\u003e (Non-Knurled, Single Side, 1 Upper\/1 Lower)\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\n\u003cstrong\u003e4170-04 \u003c\/strong\u003e(Knurled, Single Side, 1 Upper\/1 Lower)\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\n\u003cstrong\u003e4170-60\u003c\/strong\u003e (Non-Knurled, Pair, 2 Upper\/2 Lower)\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\n\u003cstrong\u003e4170-12\u003c\/strong\u003e (Knurled, Pair, 2 Upper\/2 Lower)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMaterial:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eHousing\u003c\/strong\u003e: 1045 High-Carbon Alloy Steel\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eStud\u003c\/strong\u003e: Heat-Treated 4140 Chromoly Steel\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eBearing Race\u003c\/strong\u003e: Sintered Graphite and Oil-Impregnated Bronze\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eDust Boots\u003c\/strong\u003e: Wear-Resistant Nitro-Butyl Rubber (NBR)\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eMetal-on-metal bearing design for superior durability\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eFully greaseable for easy maintenance\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eEliminates factory nylon liner for larger bearing surface\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eCompatible with aftermarket axle shafts (e.g., RCV)\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eKnurled and non-knurled options to fit any vehicle\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eReduces steering wander and play\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eIdeal for lifted Jeeps with oversized tires\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eInstallation: 100% bolt-on, no modifications required\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eRecommended Accessories:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eSynergy High-Performance Grease (Part #4119)\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eSynergy JL\/JLU\/JT Heavy Duty Steering Kit (Part #8825-10)\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eSynergy JL\/JLU\/JT HD Steering Knuckles\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003e2018+ Jeep Wrangler JL \/ JLU (All Models)\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e2020+ Jeep Gladiator JT (All Models)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWarranty: Limited Lifetime Warranty\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eCountry of Origin: Made in the USA\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003ePackage Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eChoice of single-side (1 upper, 1 lower) or full kit (2 upper, 2 lower)\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eInstallation hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eWhy Choose Synergy?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eUnrivaled Durability: Outperforms factory plastic bushings and Dana Spicer designs with a robust metal-on-metal construction.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eEnhanced Steering Precision: Corrects sloppy steering and eliminates death wobble risks, as outlined in Synergy’s JL\/JLU\/JT Death Wobble Checklist.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eOff-Road Ready: Built for aggressive off-road use, perfect for rock crawling, mudding, or desert running.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eTrusted Brand: Synergy Manufacturing is a leader in Jeep aftermarket parts, with a reputation for quality and innovation.\u003c\/p\u003e","brand":"Synergy Mfg","offers":[{"title":"Default Title","offer_id":43162310737999,"sku":"SYN4170-04","price":175.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/SKU_4170-04.jpg?v=1749578077","url":"https:\/\/www.blackopsautoworks.com\/products\/synergy-jeep-jl-jt-heavy-duty-ball-joints-knurled-1-upper-1-lower","provider":"Black Ops Auto Works","version":"1.0","type":"link"}