Mazda MX-5 NA NB ACL Race Main Bearings (Standard Size)

Con rod bearings for the MX-5 NA NB engine.

Oil Clearance – Standard

Half Type – Upper & Lower

Material – Tri-Metal

Min Std Shaft Size – 1.9661in / 49.938mm

Max Std Shaft Size – 1.9668in / 49.956mm

Min Std Tunnel Size – 2.1259in / 53.998mm

Max Std Tunnel Size – 2.1267in / 54.018mm

Max Wall at Crown – 0.0793in / 2.013mm

Max Overall Length – 0.6941in / 17.63mm