{"product_id":"isky-isk4905-dual-valve-springs-chev-holden-ls1-1-290od-125lb-seat-360lb-open","title":"Isky ISK4905 Dual Valve Springs Chev\/Holden LS1 1.290\"OD 125LB Seat 360LB Open","description":"ISKY DUAL VALVE SPRINGS CHEV\/HOLDEN LS1 1.290\"OD 125LB SEAT 360LB OPEN ISK4905The Endurance Plus series of valve springs utilises a specially processed Tool Room Material for increased endurance and reliability beyond the \"SP\" series plus special processing for increased durability. Endurance Plus springs are designed for late models, modifieds, etc and are Spintron Test-Proven up to 8400 rpm for 850 racing miles.Specs:Number of Springs Per Valve:DualOutside Diameter of Outer Spring (in):1.290 in.Coil Bind Height (in):1.065 in.Quantity:Sold as a set of 16.Seat Pressure at Installed Height (lbs): 125 lbs.Open Pressure (lbs): 360 lbs.Items are shipped within one to two business days after full payment has been recieved. \u003cbr\u003e\u003cbr\u003e\u003cbr\u003e","brand":"Isky Racing Cams","offers":[{"title":"Default Title","offer_id":44602501202231,"sku":"ISK4905","price":518.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0680\/9364\/1015\/files\/91763.jpg?v=1780367257","url":"https:\/\/enginemaster.com.au\/products\/isky-isk4905-dual-valve-springs-chev-holden-ls1-1-290od-125lb-seat-360lb-open","provider":"Engine Master","version":"1.0","type":"link"}