Detailed product specifications Manufacturer: FCP Engineering Model: FCPRHA14450620-4 Profile: beam HO axle to axle: 144mm Large part diameter: 50.6mm Flange diameter: 20mm Quantity: 4 pcs, 8 pcs ARP2000 3/8" screws Made of: 4340 EN24er forged steel Announced power: 600 HP (4-cylinder)Recommended rotation speed: 9000RPMAudi / VW / Seat / Skoda: 1.8T 20V (AEB, BAM, AWB and others) 1.8 2.0 16V (KR, PL, 9A)