Tri-metal main bearings ACL Race Series MAZDA 121, 323, MX-5 1.6/1.8

ACL Race Series tri-metal main bearing set for MAZDA 121, 323, MX-5 1.6/1.8.

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ACL Race Series tri-metal main bearings are manufactured to tight tolerances. CNC machining works to micron accuracy, followed by a metrology inspection of the bearing's diameters, thickness and width. This gives ACL Race Series bearings a reliable, consistent fit in your performance engine. ACL Race Series tri-metal bearings are actually made up of 4 layers:

- SAE1010 steel on the outside
- 0.3mm copper alloy
- 0.0001mm nickel
- 0.013 to 0.018mm copper alloy overlay

This material strategy, combined with the manufacturing process, makes ACL Race Series tri-metal bearings more resistant to increases in power, torque and engine speed. The compression strength of ACL Race Series tri-metal bearings brings reliability to your engine, even with heavily boosted turbo or supercharger builds, or high-revving tuned engines.