The ACL 4B1972HC-STD is a standard-size, CT-1 coated High Performance connecting rod bearing set for the Acura/Honda K20A2 and K24A engines. "Standard Size" means it's built for a stock, unmachined crankshaft journal, and the CT-1 coating adds a low-friction running surface for improved break-in and durability. This engine family covers the Acura RDX, RSX Type-S, TSX, and Honda Accord, CR-V, and Element.
Specifications:
- Type: Rod Bearing Set
- Series: High Performance, CT-1 Coated
- Size: Standard
- Engine Fitment: Acura/Honda K20A2/K24A (RDX, RSX, TSX, Accord, CR-V, Element)
- Part Number: 4B1972HC-STD
FAQ
What is CT-1 coating?
CT-1 is ACL's low-friction bearing surface coating, applied to improve break-in and reduce wear compared to an uncoated bearing.
What size crank journal does this fit?
Standard size - built for a stock, unmachined K20A2/K24A crankshaft journal.
What vehicles use this engine?
The Acura RDX, RSX Type-S, TSX, and Honda Accord, CR-V, and Element all used these engines depending on year and trim.

