ApplicationCompatible for Alfa Romeo 1.8L 2.0L 156 147 145 166 Twin Spark TSSpecificationPerformance Con RodsType: Forged 4340 aircraft chrome moly quality steel for racingH-beam Conrods Quantity: 4 Pieces a setBolts:Including Genuine ARP 2000 boltsNote: Extra cost for upgrading to ARP L19 bolts Bolts Size: ARP 2000 3/8\" boltsTolerance: Balanced to +/- 1 gram in set Piston Bolt Hole: +-4/1000mm Power: 600~800HPStrength of the fastening (PSI): 200,000 - 230,000 psi Torque: 48ft ≈ 65 NM Top acceleration: 7000-9000 rpm warranty: one year warranty for any manufacturing defectDimensionsCenter to center length: 145mmBig end diameter: 53.9mmSmall end diameter: 20mmBig end width: 22mmSmall end width: 22mmFeature- Forged SAE 4340 Chrome Moly Steel for the highest strength and durability, dedicated for Racing- Designed and processed by CNC machine.- All big and small ends are finished with SUNNEN honing machine- Precision alignment sleeves positively locate the rod cap, maintaining big end bore size and eliminating cap walk- 100% X-rayed, sonic tested and magnafluxed- Multi-stage heat treated- Shot peened to relieve stress- Come with the bronzed bushing suitable for the floating piston pinNote- Professional installation is highly recommended (No Instruction Included)- Custom Service:If there\'s no conrods you need on our site, we would be happy to help determine your requirements and develop a solution with you to satisfy your needs.