{"product_id":"pm-barra-valve-springs","title":"Plazmaman Ford Barra Heavy Duty Valve Springs 1200hp+","description":"\u003cp\u003eThese PRO SPRINGS suit all BA\/BF and FG Ford DOHC 6 cylinder Barra 4.0L engines. Suitable for applications 500-1200+hp\u003cbr\u003e\u003c\/p\u003e\n \u003cp\u003eThese springs are highly recommended for applications over 300rwkw (400hp), to help eliminate valve float. Valve float causes damage to valve stem seals and collets and retainers.\u003c\/p\u003e\n \u003cp\u003eOnce installed, a much more powerful and free revving top end power curve is possible. OEM valve springs have approx 50 psi seat pressure, once 15 psi is added to this equation (which acts against the valve spring), approximately only 35 psi seat pressure is left. This is nowhere near enough to keep the valves closed at high rpms.\u003c\/p\u003e\n \u003cp\u003eFEATURES :\u003c\/p\u003e\n \u003cp\u003eNew and Improved design\u003cbr\u003e Direct replacement for the OEM Bee-Hive style spring - straight drop in\u003cbr\u003e OEM retainers can be used (titanium replacements recommended for hp above 550rwkws - see other listings)\u003cbr\u003e NITRIDE TREATED OVATE Style Spring.\u003cbr\u003e 98Lbs X 240Lbs at .500 lift (thats approx 75% more than factory)\u003cbr\u003e Premium quality - We guarantee these to be the best quality ovate style valve springs available on the open market!\u003c\/p\u003e","brand":"PLAZMAMAN","offers":[{"title":"Default Title","offer_id":46401449394366,"sku":"PMVS-BARRA-BABF","price":573.56,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0594\/9453\/1262\/files\/1687975000.jpg?v=1771220316","url":"https:\/\/specperformance.co.nz\/products\/pm-barra-valve-springs","provider":"Spec Performance \/ Diesel Tuning Systems","version":"1.0","type":"link"}