Up for sale is a used Springfield Dyno exhaust for a Spec Miata. It was taken off of my '99 Spec Miata and will fit '99 and up Miatas. The exhaust has approximately 7 race weekends on it and is in good condition with no rust, corrosion, or dings; I replaced it with the MBS system in order to make sure I meet Waterford sound (I know that the SD exhaust will meet sound if used in conjunction with a Supertrapp but didn't want to deal with install/removal for different events). It also has an O2 sensor bung welded in that will fit a Bosch sensor (see picture). The bolts are not included because one fell out and the other is fairly rusted.
I am asking $100. New systems cost $300: http://www.saferacer.com/springfield-dy ... ta-exhaust
If interested please contact me via PM or email at email@example.com.