I am happy to advise that I just installed my Sun Hyper Voltage & Ground System in my '04 TL. I am running Dom's NAV/DVD Converter with a FM Modulator as I like my Musiclink/Ipod integration and did not want to lose this feature. I was disappointed with all the static/distortion prior to the SHV system.

I just finished the Sun Hyper install this morning and I now have CRYSTAL CLEAR sound. I am not getting 5.1 sound from the modulator but the separation is actually more than I thought I would get.

For those of you with FM Modulators, this may be a worthy upgrade. I hope to see better mpg and better throttle response but time will tell. A fun MOD to install as well.

This may not be the performance mod many expect but it is an excellent upgrade to your electrical system.