Exact product specifications Manufacturer: FCP Engineering Model: FCPRHMI138534820 Profile: H beam Center-center: 138.53mm Large tip diameter: 48mm Bushing diameter: 20mm Quantity: 4 pcs, 8 pcs ARP2000 5/16" screws Material: 4340 EN24er forged steelAnnounced power: 600 HP (4-cylinder) Announced maximum rotational speed: 9000 RPM Fits the "Prince" engine: Citroen, Peugeot, Mini Cooper S (MKII / R56) - 1.6 16V Turbo (N12B16A, N14B16A, N18B16A/B/C)