Please Carefully check the Size of the Rods in Specific and Description Application For Triumph Spitfire 1500 1.5L I4 Specification TÜV PRODUCT TEST AND TÜV ISO 9001 CERTIFIED Type: Forged 4340 aircraft chrome moly quality steel for racing H-beam Conrods Quantity: 4 Pieces a set Bolts:Including Genuine ARP 2000 5/16" bolts Note: Extra cost for upgrading to ARP L19 bolts Bolts Size: ARP 2000 5/16" bolts Tolerance: Balanced to +/- 1 gram in set Piston Bolt Hole: +-4/1000mm Power: 600hp ~ 800PS per set Strength of the fastening (PSI): 220,000/230,000 PSI Torque: 48ft ≈ 65 NM Top acceleration: 7000rpm warranty: 2 years warranty for any manufacturing defect Dimensions Center to center length:146.05mm/5.75" Big end diameter:51.34mm/2.021" Small end diameter:20.637mm/0.812" Big end width:22.8mm/0.898" Small end width:18mm/0.709" Feature - Forged SAE 4340 Chrome Moly Steel for the highest strength and durability, dedicated for Racing - Designed and processed by CNC machine. - All big and