Nova

Will switching from a 17inch to 18inch rims affect the performance of a GS400 '98 (especially in snowy conditions)?

Thanks.

I was planning on installing a DVD player into my Lexus and since the DVD player is also a radio/CD player. I wanted to replace the Lexus radio with my DVD Player (I already know that I'll have to get the dash fit kit).

But there is someone telling me that if I replaced the Lexus radio with my DVD Player, I will not be able to use the Lexus AMP or the Lexus speakers with the DVD player. Since this didn't sound right to me... I decided to ask a wide audience for opinions and advice :) . So what do you guys/gals think?

Thanks.