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Springs don't wear out but struts definitely do. Whether you need new ones depends on the age/mileage and duty life of the car. I would guess springs alone would bring little if any benefit unless you were also able to lower the nose and get more negative camber. If I were on a skinny budget and wanted more sport in my suspension, I would lower the nose, get 2 degrees negative front camber, and add an M030 rear sway. This is probably the most bang for a fewest bucks and will get you a lot closer to M030 performance than springs.