This is a big burly brace machined out of 1/4" aluminum and powdercoated black. It ties together both lower rear control arm mounting points, and triangulates them to the subframe to prevent any possibility of shifting under side loads. The factory brace isn't triangulated - if the car even has one! Similar braces on the market are generally made of thin steel and aren't strong enough to handle the load without flexing. Exclusive to Flyin' Miata!
Exhaust removal not required for installation.
Fits 1990-91 and 1999-05 Miatas, including the 2004-05 Mazdaspeed. You can mount it on a 1992-97, but you'll have to cut off a bracket for the stock brace.
May have conflict with JR exhaust.