H&R Hub-Centric Wheel Spacers spacers in 5x114.3 bolt pattern with the following widths: 5mm, 10mm, 15mm, 20mm, and 25mm. Extended wheel studs are included with each size. Priced per pair, meaning Quantity 1 is for two wheels only, and Quantity 2 is for all four wheels.
Note: trimming of factory studs is required for use of 15mm Spacers. Trimming for other sizes isn't required.
Reputable Wheels Spacers can safely provide you the flush look you are seeking, and/or clearance with larger brakes. In our case, we've ran both the 5mm H&R TRAK+ Wheel Spacers on our Blue Si to clear an aftermarket set of wheels over the Hyundai Genesis Coupe Retrofit Brembo Brake Kit. We are also using the the 20mm H&R TRAK+ Spacers on the factory 18x8 +50 wheels, making them +30.
These spacers are hub-centric, and come with extended studs; these two factors make this product one of the most safe options regarding spacers. We have used them on the circuit as well, and they have not failed us.