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ISR Performance Mazda Miata NA Circuit Spec Exhaust-(1994-1997)

3 Customer Reviews Write a Review

ISR Performance Mazda Miata NA Circuit Spec Exhaust-1994-1997

Mid section and tail section are standard and there are no variations available.
The exhaust features 2.5'' brushed stainless steel piping and flanges, and a polished stainless steel muffler with 4'' tip.

The current NA Miata exhausts have been tested on the OBD1 & 2 1.8L NA Miatas and do feature a secondary o2 bung.

If you have a 1.6L Miata please see our newly released 1.6L Circuit Spec listing!


Whats in the box:


  • 1x Mid pipe 
  • 1x Stainless steel muffler with 4'' tip
  • 3x 2.5" Exhuast gaskets 
  • 6x bolts
  • 6x Nuts


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Legal only for use in competition vehicles which may never be registered, licensed, and/or used on public streets or highways; and also for use in other exempted vehicles.

Write a Review
  • Amazing tone and feel!

    Posted by Ethan on 14th Jan 2023

    Insanely easy to install and even got here within the week! It was very pretty and it sounds amazing too! Would buy again if I got another miata! Just got home from a meet and people begged me to rev it left and right just because of the idle

  • It sounds so good!

    Posted by adam on 23rd Mar 2018

    Looks great. Sounds better than any NA miata exhaust I've ever heard.. No bulls***! And most importantly it fit perfect.

  • it's great

    Posted by Austin on 20th Sep 2015

    I have a 92 with a 1.6 and was worried about it fitting but I just kept my stock cat and did the isis exhaust from there back and it sounds great and had a great build quality with everything fitting on perfectly the only thing is howhat large the tip is but it still looks great