Mazda MX5 NA/NB ACL Race Connecting Rod Bearings (New) (Aftermarket)

Mazda MX5 NA/NB ACL Race Connecting Rod Bearings (New) (Aftermarket)

A trusted choice for high-performance engine builds, ACL Race connecting rod bearings offer excellent strength, heat resistance, and durability under extreme loads. Engineered for Mazda MX-5 NA and NB models, they’re ideal for turbocharged, supercharged, and track-focused BP-series engines.

The 4B8351H bearing set features ACL’s high-strength tri-metal construction with a hardened steel backing, copper-lead intermediate layer, and lead-tin overlay. This design delivers excellent oil film retention and fatigue resistance, even under sustained high RPM use. Compatible with 1.6L and 1.8L BP engines, these are a direct-fit upgrade for standard rod bearings.

Installation Notes:
Clear bearing and journal measurements should be checked prior to fitment using Plastigauge or micrometres. Always install with proper lubrication and pair with quality connecting rods for maximum durability. For best results, combine with ACL Race main and thrust bearings.

Features

• Tri-metal construction for high-load and high-RPM endurance

• Direct-fit for Mazda MX-5 NA/NB 1.6L & 1.8L BP engines

• Proven choice for turbo builds, circuit racing, and drifting