This ACL .50mm Oversized High Performance Rod Bearing Set fits Mazda B6/BP/BP-T 1.6L and 1.8L engines, as used across the Mazda 323, Miata, MX-3, and Protege, plus the Kia Rio, Sephia, and Mercury Capri, which shared this Mazda-derived engine family. The .50mm oversize designation means these bearings are sized for a connecting rod journal machined .50mm over stock.
Specifications:
- Type: Rod Bearing Set
- Series: High Performance
- Size: .50mm Oversized
- Engine Fitment: Mazda B6/BP/BP-T (1.6L/1.8L)
- Part Number: 4B8351H-.50
FAQ
What does ".50mm Oversized" mean?
It means the bearing is sized for a connecting rod journal that's been machined .50mm over stock, a larger regrind spec than the .025mm or .25mm versions.
What vehicles use the B6/BP/BP-T engine?
The Mazda 323, Miata, MX-3, and Protege, along with the Kia Rio, Sephia, and Mercury Capri, all used this Mazda-derived 1.6L/1.8L engine family.
Does this include main bearings?
No, this is a rod bearing set only.
How many bearings come in the set?
A complete set for this inline-4 covers all 4 connecting rods.

