STR60/28-28-34/35

This is a front, 4-piston, ultra-lightweight, balanced brake upgrade specifically designed for BMW E46 330i and 330Ci street/track cars. The C43 caliper is 50% lighter than the ST40 caliper, forged from aluminum, and designed for minimal weight. It features a single bridge bolt for easy pad changes. The kit includes patented Aerorotors with directional cooling vanes (309x32mm) for efficient heat dissipation and reduced pad knockback. Sport kits include Sport pads, a traditional slot pattern, and anti-rattle hardware. C43 calipers do not include dust boots, suggesting minimized street use. Pads are 17mm or 20mm thick and share a common shape (e.g., Hawk HB521, Pagid 8195 or 2205, PFC 7751, or DR21).