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

2 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
  • 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