{"product_id":"psi-valve-spring-set-800-lift-1-525-od-max-life-polished-dr424r-ml","title":"Psi Valve Spring Set - .800\" Lift - 1.525\" OD - Max Life Polished - Dr424r Ml","description":"\u003cp\u003ePSI VALVE SPRING SET - .800\" LIFT - 1.525\" OD - MAX LIFE POLISHED - DR424R ML\u003cbr\u003e\nEvery PSI spring begins with wire that is made from the highest quality Chrome-Silicon alloys. The 1200 Series builds on this by employing advanced heat-treating operations. These heat treatments increase the strength of the base materials. This increase in strength results in improvement to the fatigue limit of the wire and better resistance to load loss. These factors together allow the engine builder to push the valve train set-up to the next level. The Max Life process not only makes a good-looking spring, but decreases the possiblity of breakage and failure with a proprietary polish and process, and chamfering of the sping ID's for less retainer wear.\u003cbr\u003e\nPart Description: Dual\u003cbr\u003e\nSpring Outer Diameter: 1.525”\u003cbr\u003e\nOuter Spring Inner Diameter: 1.100”\u003cbr\u003e\nInner Spring Inner Diameter: 0.780”\u003cbr\u003e\nSpring Rate:656 Lbs.\/In.\u003cbr\u003e\nUses 5\/16\" square groove valve locks.\u003c\/p\u003e","brand":"PSI Springs","offers":[{"title":"Default Title","offer_id":52041688252710,"sku":"PSI-DR424R ML","price":459.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0741\/1666\/1542\/files\/psi-dr424r_ml_1_of_3.jpg?v=1770812870","url":"https:\/\/billysspeedshop.com\/products\/psi-valve-spring-set-800-lift-1-525-od-max-life-polished-dr424r-ml","provider":"Billys Speed Shop","version":"1.0","type":"link"}