General description H-Beam Connecting Rods with ARP 2000 Bolts are designed specifically for the Lotus Twin Cam 1600 and Lotus TC, as well as for Ford X-flow applications. These rods are made from high-quality forged 4340 aircraft chrome moly steel, ensuring exceptional strength and durability for racing purposes. Technical specifications Type: Forged 4340 aircraft chrome moly steel Quantity: 4 pieces per set Bolts: Genuine ARP 2000 3/8" bolts Power: 600~800 HP Strength of fastening: 200,000 - 230,000 PSI Torque: 48 ft ≈ 65 NM Top acceleration: 7000-9000 RPM Dimensions: Center to center length: 122.58 mm Big end diameter: 52.91 mm Small end diameter: 20.62 mm Big end width: 26.8 mm Small end width: 24.1 mm Tolerance: Balanced to +/- 1 gram in set Piston bolt hole tolerance: ±4/1000 mm Warranty: 2 years for manufacturing defects Installation Professional installation is highly recommended as no instructions are included with the product. Usage These connecting rods are designed for