Check the listing for details. Supertech Dual Springs Steel Retainers Kit Honda B-Series B16A B18C VTEC 85LB. Condition: New. Listed at 395.00 USD. Go Race Parts presents... Our special on Supertech Performance Valves & Components! This listing is for a complete set of 16 Supertech 85LB Dual Springs and Steel Retainers for all Honda/Acura B-Series DOHC VTEC applications This listing includes Supertech part numbers: SPR-H100DR Type: Dual Spring Press.Seat: 85lb @ 33.5 Press.Open: 266lb @ 14 Max Lift: 15mm Coil Bind: 18.5mm Rate: 12.9mm Retainer: RET-HBK-ST + Factory Seat *This kit requires use of factory seat locators* Valve springs are made with premium Superclean Chrome Silicon Vanadium Steel alloy for higher performance & durability at high rpms and better memory. Computer designed to ensure that wire stress levels do not overpass the limits of stress defined in the diagrams of fatigue for long durability under extreme conditions. Computer software also allows us to make sure that the harmonics are well under control. The Retainers are manufactured with high quality military certified Titanium alloy, CNC machined for a tight fit that will ensure a long durability. Product info We apply more than 30 years of experience in the development of each and every Supertech racing valve we sell. Combine this experience with state of the art equipment such as ultrasonic tests, x-rays, laser measurement equipment, and applications like computerized Finite Element Analysis (FEA) and it is no wonder why supertech has some of the best performance products on the market. While this is more than most manufacturers we don’t stop there. We also do extensive testing working very closely with many of today's top engine builders in order to continuously improve our products. All of this is meant to insure Supertech's industry leading reputation for high flow rates, durability and uncompromising quality. **** International customers are welcome **** For any questions regarding this listing please do not hesitate to contact us! We pride ourselves in the offering the best pricing and customer service on the internet!