RE-amemiya Quantum shocks are 20KG front and rear....
let me give a brief explanation of suspensions....consist of 2 major part that affects the whole experience...
1. Spring - basically a spring is to support the car weight and also to determines how much it will tilt up or down when you're cornering or braking or accelerating... so if you have a soft spring, when you brake your nose of the car will almost touching the floor.. those are called unnecessary nose dive.. when it's too hard.. basically you feel like you're riding a car without suspension. critical selection of spring is important. cars on FD... they are using double wishbone front and multi link rear. in normal circumstances, they are alot heavier springs compared to those dudes that uses macpherson strut (subarus, protons) due to the location of the suspension.
2. the absorbers - the absorbers are the ones that determines how much it will absorb when there are movement channeled from your tyres. it's more difficult to explain in technical.. in lay man term, when you have paired up on a softer absorber, your car will be bouncy... because your springs are the one that doing the work.. not your absorbers. if you have a hard absorber with a soft spring... you will feel hard when you go over pot holes, but it will feel really comfortable on flat roads as the motion is slow.
so... critical is to find the perfect balance of pairing the spring value and also the damping value. stressing your shocks arent a good idea when it comes to reliability... too much on your spring... your handling sucks...
a track suspension aren't suitable for mountain windy roads. while mountain windy roads will give you unnecessary roll on the track.
i'm using HKS Hiper D... suits me well.. but heck.. it's FD... who really cares about comfortable :P... after servicing and revalving those shocks, it feels like ohlins... i consider ohlins quite comfy... same goes to mine.. the only one i really feel hard is the quantums...