i heard that the rota sllipstream is the best choise for 15'' rims.
i have the Lightweight Brake Kit, Front and rear willwood from ams to fit 15'' rims.
can you help me to choose the ofset (ET)?
how about ET 40?
needed spacers for this fitment?

 

If you dont mind spending the coin, get Volks. 15" ce28s are about 9.5lbs per wheel. With a 24.5 slick, you are looking at about 26lbs per wheel (where stock is about 50 per).

 

Motegi traklite is 10.6 a wheel in the 15x6.5 (or 7, cant remember what we get). The centerline convo pro in a 15x7 is light as well.

 

Im running Slipstreams on mine with spacers. You will need to grind down your calipers a little to fit those rims.

 

I originally wanted traklites in a 15", but their impossible to find.

EDIT: I forgot to add that the Volks do not require spacers in the front or rear, and no grinding of the caliper is necessary.