These Brembo HP2 rear brake pads are designed for E‑Family STI rear two‑piston calipers and use the RA01 track compound. Specified for track-oriented applications, the RA01 compound is listed for rear two‑piston fitment where a track-focused friction material is required, providing a direct replacement pad formulated to Brembo's RA01 specification for that caliper type.
Brembo E-Family STI Rear 2-piston RT RA01 Compound Track Brake Pads