Why You Probably Need a 1.8 Miata Diff Upgrade
If you're pushing more power than stock or just driving your car hard on the weekends, upgrading to a 1.8 miata diff is basically a rite of passage. Anyone who has spent five minutes on a Miata forum knows the horror stories about the original 1.6-liter differentials. They're affectionately (or not so affectionately) known as "glass diffs" for a reason. One hard launch or a slightly aggressive clutch kick, and you're looking at a pile of metal shavings and a very expensive tow home. ...