Ion Redline and Voiding Warranty with SPS/SMS

I was at the saturn dealer tonight and i test drove the ION REDLINE and i must say for being a saturn its a wonderful car. I was talking to the sales person about aftermarket parts and he said SMS and SPS and i went on the sites but couldnt find anything as far as the parts voiding warranty and the sales person said "No" it doesnt. Can anyone clear this up if adding parts from Saturnmotorsports or SPS if it voids the warranty.