I would like to put some 20's on it and also lower it no more than an 1". Would eibach springs work? Or do I need to go with coil overs?

 

Yeah those will be fine

 

check out swift springs. drop no more than an inch and great ride quality and handling.

 

Id go Swift over Eibach... just my. 02˘ though coils are much better which I have now

 

I have eibach and 20s... It still seems a little too high, and i wish i went with coils the first time. If coilovers are in your budget, I would go with them.

With my eibach and 20's, the front end is fine, but theres a huge gap in the rear now that i didnt have with my 18s. It could be because i am running a low profile tire in the rear now, but I will be getting coils in the future.

BTW, ride quality sucks on the eibach, i dont know what to say about swift springs, because i never had them, but I would think its a waste of money because with 20s on swift springs, its going to look horrible because there will be a very big gap.

 

If there's a huge gap w/ your 20s that you didn't have w/ your 18s that's all in your tire sizing. If you kept the diameters the same (which you should to keep the ABS, Traction Control and speedometer in range) the gap will be the same. If you had 245/45/18s you should now be running 245/35/20 for example.
But agreed about the coils, it's worth the extra coin to have the height and feel exactly where you want it.

 

I never even really thought of doing this!

The eibachs look perfect int he front with the tire sizing and drop however the rear have a huge gap now.... Maybe I should just go with a biggier tire to offset the gap and bring everything flush again?

Thoughts?

 

As long as your new tire diameter is close to the stock diameter, use the tire calculator to figure it out. Want to be at least within 3% of your oem but less than 1% is ideal.
https://www.myg37.com/forums/tire_rim_calculator.php