there's a bit of 'blur" definition in "sport spring", some define it as "spring to lower your car", "spring to enhance your car's performance", "spring for motor-sport/competition usage" and so so. normaly the spring we could find in the market is "spring to lower your car" which is cheap, RM100~ RM300 range, which had a lower stiffness rate, and slower respond compare to stock spring. And "spring to enhance your car's performance would varies from RM500~RM1200, depend on brand and quality, which had higher stiffness and faster respond compare to original spring. And lastly would be the "spring for motor-sport/competition usage" which we usually call "coil over" which comes with absorber who sit at 1500~2000/set(spring only) with exceptional build quality, minimal stiffness-fade and very fast respond.