Kelford Cams Dual Valve Springs & Titanium Retainers - Subaru WRX 2015-2021 (+Multiple Fitments)The Kelford Cams KVS87 DT valve spring kit is designed for the Turbocharged 2015+ Subaru FA20 DIT engines. It features a Dual Spring and Titanium Retainer Kit that has 88lb seated pressure @ 32. 85mm using the OEM seat, 228lb @ 11mm lift, 262lb @ 12mm lift. Coil Bind is at 18. 55mm. This kit can also fit earlier generation FA20 engines in the 2013 21 BRZ, FR S and 86 Specs: 88lb seat pressure @ 32. 85mm install using OEM seat 228lb @ 11mm lift 262 @