{"product_id":"1989-1998-cummins-hd-valve-springs-07-s-001","title":"1989-1998 Cummins 5.9L Hamilton Cams HD Valve Springs (07-s-001)","description":"\u003cp\u003eUpgrade your 12-valve Cummins valvetrain with our Conical Beehive Valve Springs, delivering 155 lbs of seat pressure to keep valves firmly under control up to 4,500rpm RPM or 65lbs of boost\/drive pressure. This conical design offers enhanced stability for moderate cams and OEM-size valves, all the way up to 4,500 RPM.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy Conical Beehive Springs?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eImproved Valvetrain Control: Reduce valve float and reversion, critical issues when boost and RPM levels rise.\u003c\/li\u003e\n\u003cli\u003ePower-Boosting Potential: Customers have reported 10–12 HP gains when switching from 60 lb springs to our beehives, thanks to consistent valve seal and reduced reversion.\u003c\/li\u003e\n\u003cli\u003eHigher Seat Pressure (155 lbs @ 1.880″): Ensures valves won’t be forced open by intake or exhaust pressures, safeguarding against damage and power loss.\u003c\/li\u003e\n\u003cli\u003eConical Shape for Stability: The latest spring design improves harmonic damping, leading to smoother, more reliable operation at higher RPM.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhat’s Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRetainers \u0026amp; Locks: Ready to install for most 12-valve Cummins configurations.\u003c\/li\u003e\n\u003cli\u003eOptional Locks: Increase your installed height by .075″ if needed for specific build requirements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Considerations\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRPM Range: Perfect for builds up to 4,500 RPM with mild-to-moderate cam profiles and stock-size valves.\u003c\/li\u003e\n\u003cli\u003eWhen to Upgrade: If you exceed 4,500 RPM or .360″ lift aftermarket cams, or use larger valves, consider stepping up to our Dual Spring kit for added safety and control.\u003c\/li\u003e\n\u003cli\u003eCombat Valve Float \u0026amp; Reversion: Keep harmful exhaust gases out of the intake stroke, preserving combustion quality and maximizing power.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eElevate your 12-valve Cummins performance with our Conical Beehive Valve Springs (155 lbs seat pressure)—an essential upgrade for improved reliability, consistent power, and better valvetrain durability under demanding conditions.\u003c\/p\u003e","brand":"Hamilton Cams","offers":[{"title":"Default Title","offer_id":50620289024286,"sku":"07-s-001","price":613.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7171\/1262\/files\/Product_Image_-_2026-01-16T145802.460.png?v=1771369442","url":"https:\/\/platinumhpsolutions.myshopify.com\/fr\/products\/1989-1998-cummins-hd-valve-springs-07-s-001","provider":"Platinum High Performance Solutions, LLC.","version":"1.0","type":"link"}