With the lowering springs you may need to get caster/camber plates. Some people are able to get their car aligned right without them some people cant.

 

A couple things to take note about the UDP...

There will be slightly more resistence with the power steering.
The AC will take a little bit longer to cool the cabin.
If you have a big stereo, either custom or the Shaker1000, charging could become a problem if you idle alot.

...Other than that there shouldn't be any problems. A tune is not required, you don't have to worry about cooling the engine because the UDP kit comes with a bigger water pump pulley.

There is nothing wrong with the Diablosport tuner, but the Diablosport canned tunes that come preloaded on the tuner are what people are complaining about. They are better than stock, but if you can get a mail order or dyno tune it will be much MUCH better. Even a tune from Bamachips should be much better than the Diablosport tune.

 

Guys,
Called Steeda again today. Basically their tech guy said that the springs are made to mach up with the stuts/shocks for long term but he recommends getting strut mounts. The stock strut mounts are sub par and many people have problems with them Other than that it should be fine. At least thats what I was told. I'm checking out the brenspeed tune tomorrow. Thanks again!

 

I rode with the stock struts and rear shocks for about 5000 miles and although the ride with the tokico's is ALOT better, The stock units are just a bit more bouncy. To tell the truth I actually think the car steered a bit better out of the turns with the stocks but the tokico's allow for much better tuning of the ride and cornering .