ACL 4B1293H-STD Race Series STD Rod Bearing Set for Hyundai/Kia/Theta 2.0L

Vehicle Fitment

• 2010-2014 Hyundai Genesis Coupe 2.0T (G4KF, 2.0L Turbo)
• 2011-2013 Hyundai Sonata 2.0T Limited / SE (G4KH, 2.0L Turbo)
• 2010-2013 Kia Forte EX / LX (G4KD, 2.0L)
• 2010-2013 Kia Forte Koup EX (G4KD, 2.0L)
• 2011-2013 Kia Optima EX / SX / SXL (G4KH, 2.0L Turbo)
• 2011-2013 Kia Sportage SX (G4KH, 2.0L Turbo)

Fitment Notes

• Fits all Hyundai/Kia Theta and Theta II family engines: G4KA, G4KC, G4KD, G4KE, G4KG, G4KJ, G4KF, G4KH, G4KL
• Standard (STD) size -- for use on standard/unworn crankshaft rod journals only
• Undersized versions available separately for reground crankshafts (.25mm, .50mm)
• HX version (extra oil clearance) available: ACL 4B1293HX-STD
• Companion main bearing set: ACL 5M1295H-STD
• Professional engine builder installation required
• Verify crank journal diameter before installation

Features

• ACL Race Series performance bearing
• F781 Trimetal construction
• Identical upper and lower bearing halves
• High-strength overlay plate -- reduced thickness for improved fatigue properties
• Hardened steel backs -- improved support and bearing retention
• Increased crush for improved bearing retention in housing
• Enlarged ID chamfers -- accommodates performance crankshaft fillet radii
• Tight consistent wall tolerances
• Increased eccentricity -- compensates for bore distortion at high RPM
• Race-proven -- used in championship-winning engines worldwide

Specifications

• Application: Hyundai/Kia Theta / Theta II I4 family (G4KA, G4KC, G4KD, G4KE, G4KG, G4KJ, G4KF, G4KH, G4KL)
• Bearing type: Connecting rod (big end)
• Size: Standard (STD)
• Material: F781 Trimetal
• Half type: Identical upper and lower halves

Included Components

• 4x Upper rod bearing shells
• 4x Lower rod bearing shells

Product Description

The ACL 4B1293H-STD is a Race Series connecting rod bearing set engineered for Hyundai and Kia Theta and Theta II family I4 engines, covering naturally aspirated and turbocharged variants including the G4KF (Genesis Coupe 2.0T), G4KH (Sonata/Optima/Sportage 2.0T), and G4KD/G4KA/G4KC/G4KE (naturally aspirated applications). ACL Race Series bearings are used in championship-winning engines across NASCAR, NHRA, IHRA, and land speed record applications. The F781 Trimetal construction delivers superior load capacity, fatigue resistance, and conformability over OEM bearings, making them ideal for high-revving street builds, turbocharged applications, and dedicated competition engines.

Hardened steel backs provide improved housing support and bearing retention under high-load conditions, while the enlarged ID chamfers accommodate the fillet radii of performance crankshafts. This Standard (STD) set is sized for unworn or new crankshaft rod journals. An HX version with +0.001" extra oil clearance is available (4B1293HX-STD) for high-RPM or high-output builds. Undersized versions (.25mm and .50mm) are available separately for reground crankshafts. The companion main bearing set is ACL 5M1295H-STD. Professional installation by a qualified engine builder is required.