The Eibach Pro-Spacer 15mm kit (S90-6-15-056-B) is a pair of black wheel spacers machined from aluminum alloy that the manufacturer describes as aircraft-grade. The manufacturer also says the spacers are hub-centric, so the wheel centers on the hub itself and not only on the lug holes, which helps with wheel balance. Compared with steel spacers, the aluminum body keeps unsprung weight lower, and the wider track gives an S550 a more planted, aggressive stance. The manufacturer backs the kit with a five-year warranty, which is a meaningful point of difference from budget no-name spacers.
For owners searching for 2015 Mustang S550 wheel spacers, 15mm track widening, 5x114.3 hub-centric spacers, or Eibach Pro-Spacer EcoBoost and GT fitment, this kit covers the core requirements. The manufacturer's listing shows a 5x114.3 bolt pattern, a 70.5 hub center bore, and M14x1.5 studs, and the kit ships with both spacers and the mounting hardware. The manufacturer's product pages list the application as 2015–2017 Mustang GT Coupe and EcoBoost Convertible (S550), and other listings show broader years, so confirm your exact model year with the manufacturer before ordering. Check that your factory studs and lug nut seats match the M14x1.5 thread, and torque the wheels after installation as the manufacturer directs.
The manufacturer's product pages list this kit for 2015 to 2017 Mustang GT Coupe and EcoBoost Convertible (S550) models. Other listings show wider year ranges, so confirm your exact year and trim with the manufacturer before buying.
Yes. The manufacturer describes the Pro-Spacer as precision engineered to be hub-centric, which is intended to support proper wheel fit and balance.
The manufacturer lists the kit as two spacers with all necessary mounting hardware.
