{"product_id":"hamilton-cams-155-lb-beehive-valve-spring-kit-89-98-5-9l-cummins","title":"Hamilton Cams 155 lb Beehive Valve Spring Kit 89-98 5.9L Cummins","description":"\u003cp\u003eConical beehive valve springs for the 12-valve Cummins at 155 lbs seat pressure measured at 1.880 inches, supplied with retainers and locks. The conical shape improves harmonic damping over a straight spring, and the higher seat pressure keeps valves from being pushed open by boost or drive pressure. Hamilton rates the package to 4,500 RPM or 65 lbs of boost.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e155 lbs seat pressure at 1.880 inches\u003c\/li\u003e\n\u003cli\u003eConical beehive design for improved harmonic damping and stability\u003c\/li\u003e\n\u003cli\u003eControls the valvetrain to 4,500 RPM or 65 lbs of boost and drive pressure\u003c\/li\u003e\n\u003cli\u003eReduces valve float and reversion under boost\u003c\/li\u003e\n\u003cli\u003eCustomers report 10-12 HP gains moving from 60 lb springs\u003c\/li\u003e\n\u003cli\u003eSuited to moderate cam profiles and OEM-size valves\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eWhat's Included\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eValve springs\u003c\/li\u003e\n\u003cli\u003eRetainers and locks, ready to install on most 12-valve configurations\u003c\/li\u003e\n\u003cli\u003eOptional locks available to increase installed height by .075 inch\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFitment\u003c\/h4\u003e\u003cul\u003e\u003cli\u003e1989-1998 Dodge Ram 5.9L Cummins 12-valve\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eWhen to Step Up\u003c\/h4\u003e\u003cul\u003e\u003cli\u003eAbove 4,500 RPM, with aftermarket cams over .360 inch lift, or with larger valves, move to the Hamilton Cams dual spring kit\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eProduct Details\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBrand: Hamilton Cams\u003c\/li\u003e\n\u003cli\u003eManufacturer Part Number: 07-s-001\u003c\/li\u003e\n\u003cli\u003eUPC: 857340008698\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hamilton Cams","offers":[{"title":"Default Title","offer_id":47609121341613,"sku":"07-s-001","price":389.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0747\/5200\/0173\/files\/S-001_e38a4de1-b96c-468c-884d-26947ef7b0b3.jpg?v=1789536918","url":"https:\/\/www.dfispdx.com\/products\/hamilton-cams-155-lb-beehive-valve-spring-kit-89-98-5-9l-cummins","provider":"Diesel Fuel Injection Service","version":"1.0","type":"link"}