C'mon are you really starting this debate? Yes the pro-kit will increase handling slightly due to the lower center of gravity BUT it is not a "performance" suspension modification. It is a cheap lowering alternative to coilovers and will give mild handling improvements over OEM because of the lowered center of gravity.

As YOU said, improving performance is a marriage of the setup. The OEM suspension was not set for the damping or travel of the eibach springs. Yes I agree some coilovers are cheap and also just for drop and not so much performance but in general terms for a newb on the forum coilovers = performance and lowering springs = inexpensive drop.

 

Is the eibach ride noticeably rougher or just stiffer? how about rubbing going over speed bumps or driveways?

 

^It's stiffer, sometimes it gets super annoying, it's very bad for the struts too. On the other hand it does no rub but it might hit the subframe over bumps if you go fast. After the front wheels we have a subframe that always likes hitting bumps. But 80% of bumps won't come close.

 

i just got my eibachs yesterday... almost done installing them... how long will i need new struts 6mtg37s?? lmao

 

Depends on the roads you drive on, if they're good you don't need to worry for a while. I have had mine on for a year and a half and I just felt the struts getting weaker.

 

I have the eibachs on my G and I daily drive, autocross, and do track days and so far they provide an awesome handling car. I can get off a interstate with a the loop at 70mph and the car just hugs the corner. I love them and wouldn't say they were a waste of money at all.