I just ran across these.
19 inch Black Mesh Wheels Rims Fit Porsche Cayman 911 Carrera Boxster | eBay
My car originally came with the Carrera Light wheels, but when I bought the car those wheels were off the car. Looking at this post here.
http://986forum.com/forums/boxster-parts-sale-wanted/54450-fs-porsche-boxster-18-carrera-light-ps2.html
The size and offset of the Carrera Light wheels are.
Fronts are 18 x 7.5 ET50
Rears are 18 x 9 ET52
The size and offset of the new wheels are.
Fronts are 19 x 8.5 ET42
Rears are 19 x 10 ET42
So I would run a 5mm spacer on the front and 3mm spacer on the rear?
Front
Rear
Does this sound right?
EDIT: I'm going to run 235/35R19 on the front and 275/30R19 on the rear. May need to up the spacer size with these tires?