New stuff by Duratech! The company just launch new product which is oversized (1mm) forged valve springs for 4g93. So it means that it can also use by 4g91 ,4g92 and 4g93T . I'm not really sure if it can also use in MIVEC but i think it is not plug and play. Pictures below.
The advertise price in the market is MYR 1000 for all 16 pieces intake and exhaust valve.For more info you guys can contact Full Throttle Zone Racing. Credits to them for the pictures.