Originally Posted by TehkMob

Lowering springs dont do **** to stock shocks... The lowering sprigs end up being preloaded before they ever go on the car!! Do you know what preload is? Means there is already compression on the spring before ANY weight is put on it by the car. You have to compress the lowering spring before you can even put them on! how does that affect the shock? A stock shock still has like 3000 inches of suspension travel plus most lowering spring come with a stiffer spring than stock.. You will NEVER hit bumpstop on a stock shock with a good lowering spring period. You can rock lowering spring on a stock shock on a 350 all fuggin day with out problems unless your shocks already have the miles... One thing he did say that was right, 1. be realistic with the goals you have for your car and 2. budget.

Originally Posted by Z1 Performance

the average lowering spring for a 350Z is either 1. progressive in nature or 2. not a tremendous increase in spring rate from stock. Hitting the bumpstops becomes much more likely with a lowering spring on this car. The stock shocks were never valved to control a spring with a massively increased rate, and were never conceived to have their stroke cut by large %'s. This is why you find that a stock shock with a lowering spring, take your pick which one, tends to have an average life of around 30-40k miles, when those springs were installed onto new shocks.