Part N#: PS 3506/24
O/D: .955
I/D: .687
Seat Pres: 1.400:60
Open Pres: .920:155
Coil Bind: .810
I cant be 100% certian but im sure these are the same springs 6BOOST was selling which apparently have a 50% higher base pressure, but as i have no idea what springs he was selling, or i dont have base pressure figures for stock springs i cant be 100% certian. Though i have been assured before purchasing these springs from performance springs that they do have a somewhat higher base pressure rating over stock.