{"product_id":"progressive-412-shocks-harley-davidson-19","title":"Progressive 412 Shocks — Harley-Davidson","description":"\u003cp\u003eProgressive 412 Series shocks deliver smooth, consistent damping through a nitrogen-charged, multi-stage velocity-sensitive design in a durable double-wall steel body. The five-position preload adjuster lets you tune spring rate for your weight and riding style, with options for chrome or black finishes and progressive or heavy-duty spring rates.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eDouble-wall steel damper body\u003c\/li\u003e\n  \u003cli\u003eHigh-pressure nitrogen gas charged\u003c\/li\u003e\n  \u003cli\u003eMulti-stage velocity-sensitive damping valve\u003c\/li\u003e\n  \u003cli\u003e5-position cam-style preload adjuster\u003c\/li\u003e\n  \u003cli\u003eProgressive or heavy-duty spring rate options\u003c\/li\u003e\n  \u003cli\u003eChrome or black finish choices\u003c\/li\u003e\n  \u003cli\u003eOptional show chrome covers on select applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Progressive\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e 412-4037C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 10.7 lb\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Suspension \/ Shocks and Struts\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWARNING:\u003c\/strong\u003e Cancer and Reproductive Harm — California Prop 65. www.P65Warnings.ca.gov\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits Harley-Davidson models. Verify specific year and model compatibility before ordering, as the 412 is offered in multiple applications.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eCan I adjust the preload myself?\u003c\/h3\u003e\n\u003cp\u003eYes. The 5-position cam-style adjuster lets you change preload without tools — dial it up for heavier loads or stiffer feel, down for lighter riders.\u003c\/p\u003e\n\u003ch3\u003eWhat's the difference between progressive and heavy-duty springs?\u003c\/h3\u003e\n\u003cp\u003eProgressive springs offer a softer initial ride that firms up as you compress them. Heavy-duty springs provide consistent stiffness throughout the stroke.\u003c\/p\u003e\n\u003ch3\u003eDo these come with show chrome covers?\u003c\/h3\u003e\n\u003cp\u003eStandard 412 shocks have a black finish. Show chrome covers are available as optional upgrades on select applications — check fitment details.\u003c\/p\u003e\n\u003ch3\u003eHow long do these shocks typically last?\u003c\/h3\u003e\n\u003cp\u003eProgressive 412s are engineered for long-term reliability. Life expectancy depends on riding conditions, maintenance, and load — but the durable steel construction handles hard use.\u003c\/p\u003e\n\u003ch3\u003eIs installation difficult?\u003c\/h3\u003e\n\u003cp\u003eShock installation varies by Harley model. Most riders have it done at a shop in 1-2 hours, or experienced DIY riders can handle it with basic tools.\u003c\/p\u003e\n\u003ch2\u003eCalifornia Proposition 65 Warning\u003c\/h2\u003e\n\u003cp style=\"font-size:11px;color:#888;\"\u003e\u003cstrong\u003eWARNING:\u003c\/strong\u003e Cancer and Reproductive Harm — California Prop 65 (Y). www.P65Warnings.ca.gov\u003c\/p\u003e","brand":"Progressive","offers":[{"title":"Default Title","offer_id":53040147497071,"sku":"T14-614006","price":379.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_67c242cc-3773-4299-8e74-9c2a6105ecc5.png?v=1779566478","url":"https:\/\/vtwinbikers.com\/products\/progressive-412-shocks-harley-davidson-19","provider":"Vtwinbikers","version":"1.0","type":"link"}