If you are changing wheels, find something you like that is the correct offset without spacers. Spacers add weight and complexity.

For the GT3, we recommend a 19x8.5 ET51 and 19x12 ET 63. Our Tech1-110 setup removes 30 lbs of unsprung weight and is a direct bolt with your factory hardware (bolts) as well as TPMS. No spacers and very light weight.
Some guys like a 19x9 in front, and we have that available as well.
For the GT3 RS, we use a 19x12 rear, ET48. No spacers.

We also make direct bolt-on setups for Centerlock cars.

For you track guys, we also make an 18 inch setup for all the Turbos, GT3s and RSs. It clears all the brakes, including PCCBs and StopTech.

 

That's exactly my thought. Can't go wrong with correct fitment without spacer and a weight-saving of 30lbs UNSPRUNG. For the 19x12R on an RS, what size tire can you run? Thanks.

 

You can run the 305 from the GT3 or the 325 from the GT3 RS. Since the Centerlock RS uses a 325, that would be my recommendation.

 

Thanks.

 

where did you get your gt3 RS wheels. any sources would be appreciated