{"product_id":"comp-cams-h604-16","title":"COMP Cams GM 603\/604 0.570in Lift 1.077\/1.282 OD Beehive Hustler Valve Spring Kit","description":"\u003cp\u003eCOMP Cams Hustler Valve Springs are an improved version of the popular GM LS6 \"blue\" valve spring. They are based on popular GM part #12499224 and #12565313 LS6 springs but with 4% higher seat and open loads for better dynamic control, as well as an extra .020\" of lift capability. They are an excellent performance upgrade in GM 603\/604 and CT525 LS crate Race Applications with tight rules packages.\u003c\/p\u003e\u003cp\u003eGenuine COMP Cams. Part number H604-16.\u003c\/p\u003e\u003cp\u003eImported to order from our US supply partner — allow 7-14 days delivery.\u003c\/p\u003e","brand":"COMP Cams","offers":[{"title":"Default Title","offer_id":62155165663619,"sku":"H604-16","price":342.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1018\/6506\/2787\/files\/5ca2387d72ac2dd0cbb9fa282fd33fc4L.jpg?v=1785028625","url":"https:\/\/www.mlperformance.co.uk\/products\/comp-cams-h604-16","provider":"ML Performance","version":"1.0","type":"link"}