i have a stock suspension 06 tl with an automatic. i have a set of aftermarket 18x8 wheels with 38mm offset. my question is if i should use spacers to achieve the flush look. Some people say yes, some say no. This is my daily driver. What sizes would i need? I have seen several cars on here where the rears look like they are sunk in too far. Thanks for the advise.

 

Those wheels will move the wheel/tire @ 1/4" farther out towards the fender, so install them, see how they look, and them make a determination if you want to go out any more, then consider spacers. Personal choice.