General description Forged 4340 Connecting Rods ARP2000 are designed specifically for Honda K20 engines, including K20A2, K20Z1, and K20Z3 models. These rods are not compatible with K20A3 engines. They are made from high-quality forged SAE 4340 chrome moly steel, ensuring maximum strength and durability for racing applications. Technical specifications Type: Forged 4340 aircraft chrome moly quality steel Quantity: 4 pieces Bolts: ARP 2000 3/8" bolts (optional upgrade to ARP L19 bolts available) Advertised horsepower rating: 200 HP/piece Top acceleration: 9000 RPM Dimensions: Center to center length: 139 mm / 5.472" Big end diameter: 51 mm / 2.008" Small end diameter: 22 mm / 0.866" Big end width: 19.8 mm / 0.78" Small end width: 19.8 mm / 0.78" Package size: 28 cm x 21 cm x 10 cm Installation Professional installation is highly recommended for optimal performance and reliability. Usage These connecting rods are ideal for racing applications, providing enhanced strength and performance