Review on 🚀 Spectre Performance 81413 Mass Air Flow Sensor Adapter: Enhance Airflow and Performance by Ryan Whatley

As mentioned the 4 "inner" holes (necessary to fit AFM on Miata 90-93) were not drilled in the product I received. There were a couple of holes to mark where holes could be drilled, but one of them wasn't quite in the right place. However, drilling as needed was easy enough; just a nuisance. As mentioned, there isn't much room for a nut or bolt when using internal holes, but given the size/shape of the square AFM entry on the Miata 90-93 there aren't many alternatives without a significant increase in cost. Article Manufacturing. Also, the metal is very soft aluminum so the item may not take a lot of abuse, but hopefully once installed, abuse will not be an issue. Summary: Not a perfect fit/fit and it does require some DIY, but it's not outrageous. for such a cheap item. It's okay, but not great.