{"product_id":"firestone-coil-rite-air-helper-spring-kit-rear-07-17-jeep-wrangler-unlimited-w237604173","title":"Firestone 4173 Coil-Rite Rear Air Helper Spring Kit for 07-18 Jeep Wrangler JK","description":"\u003cmeta name=\"keywords\" content=\"Firestone Jeep Wrangler air springs, Coil-Rite air helper spring kit, adjustable rear air springs, Jeep Wrangler suspension upgrade, heavy load support Jeep, polyurethane air springs for Jeep, Firestone 4173 suspension kit, no drilling air spring installation, Jeep Wrangler handling improvement, OEM quality Jeep suspension parts\"\u003e\u003cmeta name=\"description\" content=\"Enhance your 2007-2018 Jeep Wrangler's handling with Firestone's 4173 air spring kit. Easy install, adjustable support, and durable for heavy loads.\"\u003e \u003cmeta name=\"x-apple-disable-message-reformatting\"\u003e\u003ch4\u003eVehicle Fitment\u003c\/h4\u003e\u003cul\u003e \u003cli\u003e2007-2018 Jeep Wrangler (JK 2-door; 3.6 L V6; 2WD\/4WD)\u003c\/li\u003e \u003cli\u003e2007-2018 Jeep Wrangler Unlimited (JK 4-door; 3.6 L V6; 2WD\/4WD)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFitment Notes\u003c\/h4\u003e\u003cul\u003e \u003cli\u003eRear coil spring air assist only; not compatible with Rubicon models\u003c\/li\u003e \u003cli\u003eDoes NOT require drilling for installation\u003c\/li\u003e \u003cli\u003eManual fill only; air compressor sold separately\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFeatures\u003c\/h4\u003e\u003cul\u003e \u003cli\u003eHigh-strength polyurethane air springs integrate inside OEM rear coils\u003c\/li\u003e \u003cli\u003eAdjustable 5-35 psi for load support from 500 lb to 1,000 lb\u003c\/li\u003e \u003cli\u003eImproves handling, braking, and ride comfort under load\u003c\/li\u003e \u003cli\u003eTemperature rated for -40 °F to 180 °F performance\u003c\/li\u003e \u003cli\u003eIncludes air lines, inflation valves, and mounting hardware\u003c\/li\u003e \u003cli\u003eNo welding or drilling required--OEM bolt-on simplicity\u003c\/li\u003e \u003cli\u003eBacked by limited lifetime warranty\u003c\/li\u003e \u003cli\u003eQuick 1-2 hour install time per side\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003cul\u003e \u003cli\u003ePart Number: 4173 (Coil-Rite Rear Kit)\u003c\/li\u003e \u003cli\u003eRear Axle Position; Bellows Material: Polyurethane\u003c\/li\u003e \u003cli\u003eAir Spring Size: 5.5\" diameter x 7\" length\u003c\/li\u003e \u003cli\u003eOperating Pressure: 5-35 psi; Capacity: 500-1,000 lb per set\u003c\/li\u003e \u003cli\u003eTemperature Range: -40 °F to 180 °F\u003c\/li\u003e \u003cli\u003eWarranty: Limited lifetime (bellows); 2-year on hardware\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eIncluded Components\u003c\/h4\u003e\u003cul\u003e \u003cli\u003e2x Polyurethane air helper springs\u003c\/li\u003e \u003cli\u003e1x Pre-assembled air line and fittings\u003c\/li\u003e \u003cli\u003e2x Manual inflation valves with caps\u003c\/li\u003e \u003cli\u003eMounting brackets, bolts, washers\u003c\/li\u003e \u003cli\u003eInstruction manual with torque \u0026amp; fill-pressure guide\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eProduct Description\u003c\/h4\u003e\u003cp\u003eThe Firestone 4173 Coil-Rite Rear Air Spring Kit is designed specifically for 2007-2017 Jeep Wrangler JK models (2-door and Unlimited 4-door) with 3.6 L V6 engines. This reliable air helper spring kit installs inside the factory rear coil springs, offering adjustable support between 5-35 psi to improve ride quality, handling, and braking under heavy loads without sacrificing comfort.\u003c\/p\u003e\u003cp\u003eFeaturing durable polyurethane bellows rated from -40 °F to 180 °F and supporting up to 1,000 lb of cargo weight correction, the 4173 kit is a simple bolt-on solution--no drilling or welding required. Installation takes roughly 1-2 hours, and the system is backed by Firestone's lifetime warranty on bellows and 2-year hardware coverage. Ideal for Wrangler owners needing extra support for towing, off-road gear, or heavy rear-end loads.\u003c\/p\u003e","brand":"Firestone","offers":[{"title":"Default Title","offer_id":53465166905663,"sku":"FIR4173","price":126.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0832\/7308\/9343\/files\/10db5603403043c34f37a31842539935_371945e1-c2cc-430b-844b-c6ee3b1b588a.jpg?v=1780178402","url":"https:\/\/wcaperformance.com\/products\/firestone-coil-rite-air-helper-spring-kit-rear-07-17-jeep-wrangler-unlimited-w237604173","provider":"WCA Performance","version":"1.0","type":"link"}