I had, but taken out by my mechanic later on. Some told me it's a surplus item for normal cars due to the engine vibration isn't that serious (unless you had a over 300bhp+ engine that rocks ur car hard)
Would like to know more about RB25. How is FC like lets said is a stock engine with 5 sp manual 1 full tank = how many litre ? and can last how much KM ? If the driver is not stepping it hard, will it be heavy...