Skunk2 306-05-1140 Alpha Series H-Beam Connecting Rods for K20 Honda Engines

Vehicle Fitment

• 2002-2006 Acura RSX Type-S (2.0L K20A2)
• 2005-2006 Acura RSX Type-S (2.0L K20Z1)
• 2006-2011 Honda Civic Si (2.0L K20Z3)

Features

• Alpha Series H-beam connecting rods forged from high-strength 4340 chromoly steel
• Straight H-beam design for optimal strength-to-weight ratio and reduced reciprocating mass
• Precision CNC-machined and shot-peened for fatigue resistance and durability
• Balanced to within ±1 gram for improved smoothness and reliability
• Bronze wrist pin bushings for enhanced wear resistance and lubrication
• Dual oil passages at pin ends for improved lubrication under load
• 3/8-inch ARP2000 rod bolts included for high-clamp strength
• Capable of handling high horsepower builds (900 hp+ potential with correct supporting mods)

Specifications

• Set of: 4 connecting rods
• Material: 4340 chromoly steel
• Design: H-beam configuration
• Length (C-to-C): 139.00 mm
• Balanced: ±1 g
• Rod Bolts: ARP2000 3/8-inch
• Weight (approx): 499 g per rod
• Finish: Precision machined

Included Components

• 4x Skunk2 306-05-1140 Alpha Series Connecting Rods
• 4x ARP2000 3/8" rod bolts
• Installation lubricant

Product Description

The Skunk2 306-05-1140 Alpha Series H-Beam Connecting Rod set is a premium engine upgrade built for Honda K-series engines, including the K20A, K20Z1, and K20Z3 found in Acura RSX and Honda Civic Si models. Forged from high-strength 4340 chromoly steel and precision CNC-machined, these rods provide exceptional strength and reliability for high-performance builds.

Featuring a straight H-beam design, factory-shot-peened construction, and bronze wrist pin bushings, the Alpha rods deliver a strong strength-to-weight ratio and enhanced lubrication thanks to dual oil passages. Balanced to within ±1 gram and paired with ARP2000 rod bolts, this set is capable of handling engines targeting aggressive power levels when properly supported with correct pistons and tuning.

Ideal for enthusiasts upgrading their K20 engine for track or high-output street use, these connecting rods combine durability, precision, and performance. Always verify piston compatibility and torque specifications prior to installation to ensure optimal engine performance and longevity.