applicationCompatible for Ford YB Sierra Escort 2.0 RS 16V Cosworth RS500Specification- Piston Bolt Hole: +-4/1000mm- Power: 600~800HP- Strength of the fastening (PSI):200,000 - 230,000 psi- Torque: 48ft ≈ 65 NM- Top speed: 9000rpm- Material: Forged 4340 aircraft chrome moly quality steel for racing- Quantity: 4 Pieces a set as showing in picture- Bolts: Including Genuine ARP 2000 3/8\" bolts (Note: Extra cost for upgrading to ARP L19 bolts)- Weight Tolerance: Balanced to +/- 1 gram in set  - Warranty: one year warranty for any manufacturing defect.DimensionsCenter to center length: 128.55mmBig end diameter: 55.00mmSmall end diameter: 24.00mmBig end width: 25.90mmSmall end width: 25.90mmNote* Professional installation is highly recommended (No Instruction Included)* For any needs please contact us