Wow..i was ultra siked to find that ferrea made a complete valve train for the 3sge.Expensive as hell buit i think i will do this set up.. http://www.slowboyracing.com/estore/pro ... stseller=Y ^^^ 1st to buy [in a kit at that] $710.00 Spring O.D. - 28.00mm Spring I.D. - 16.51mm Seat Pressure - 87 lbs. Open Pressure - 195 lbs. Rate Inch - 285 lbs. Coil Bind - 21.5mm Max Net Lift - 12.5mm Spring Material - Enhanced Alloy Springs This kit is more than just the dual springs, it is an entire kit which includes: Ferrea Enhanced Alloy Dual Springs Ferrea Titanium Retainers Ferrea Spring Seat Locators. Fitments - Any 2.0L DOHC 16 Valve 3SGE Engine Other Needed Parts: MR2/ Toyota 2.0l Turbo 1mm over FER F1864P 8 MR2/ Toyota 2.0l Turbo 1mm over FER F1866P 8 MR2/ Toyota 2.0l Turbo radial groove locks FER K10037 32 ~ These above parts are for the 3sgte but from what ppl are telling me at AT.net..they will fit our 3sge's