High Performance Spring Kit Valve Spring and Titanium Retainer Kit designed to work seamlessly with the BMW / Toyota B58 3.0L Inline 6. Made using high-performance PACALOY™, a beehive valve spring and titanium retainers, this kit is sure to offer outstanding performance. Kelford's kit is specifically engineered to work well with their Stage 1, Stage 2, and Stage 3 B58 camshafts to provide exceptional quality, reliability, and performance. 90lb seat pressure at 36.5 mm installed height; 193lb at 11.0 mm valve lift Spring coil bind height at 23.6 mm Valve Spring Fitment Guide Racing Spring Kit High Energy, Extreme Racing Valve Springs designed for BMW / Toyota B58 3.0L inline 6 Engine. High performance, progressively wound PACALOY beehive valve spring with titanium retainers. This kit utilises a precision machined spring seat to max out the seat pressure for high boost, high horsepower builds. Specifically designed for Kelford Cams Stage 2 & Stage 3 Camshafts for engines making over 1000HP.  110lb seat pressure at 34.6mm installed height 210lb at 10.8mm valve lift Spring coil bind height at 22.8mm