I just got a Siebon NSM spoiler, springs and spacers installed at Precision R.
ENTER PRECISION R
When I was first looking for a place, I had a hard time finding info, so I just wanted to drop a note here. They did a great job, didn't charge me for the spacers, since the wheels were coming off anyway. One of my lock nuts was broken during the process and they ran up to the Nissan dealer to get replacements. Turns out the dealer where I bought the car had installed lock nuts for a smaller passenger car. The dealer gave them replacements, no questions asked. Droped the car off in the evening and had it back by the next day.
Anyway if you are looking for a shop in San Antonio, Give Precison R a call.
Here is a pic of the before and after.
Before
After