ISR Performance Circuit Spec Cat Back Exhaust Mazda Miata NB 1999-2005 | IS-CSEXH-NB

Rated 4.9 out of 5
Based on 17 reviews
SKU: isrIS-CSEXH-NB
Availability: Out Of Stock
Type: Exhaust Cat Back
Regular price
$495.00
Regular price
$550.00
Sale price
$495.00
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Regular Price: $550.00 - Instant discount: $55.00 = $495.00


Subtotal: $495.00

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Part #: IS-CSEXH-NB

A front and mid pipe that mounts directly to the header and features an integrated muffler. This section of pipe is 2.5'' brushed stainless steel construction. The rear section will feature a polished stainless steel muffler with 4'' tip. The NB Miata exhausts also come with a secondary o2 bung and o2 bung extension for individuals using factory ECU who do not want to have a CEL.

Features a 2 piece design.

IMPORTANT NOTE:

This exhaust has not been tested on the turbo mazdaspeed model.

**Roughly 18lb weight savings over the stock exhaust**






average rating 4.9 out of 5
Based on 17 reviews
  • 5 Stars
    16 Reviews
  • 4 Stars
    1 Review
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    0 Reviews
  • 2 Stars
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  • 1 Star
    0 Reviews
Review posted
Reviewed by Emily C.
Verified Buyer
Rated 5 out of 5

Amaze Ball

Nice tone. Loud at all RPMS. shoots flames and make gun pops. All stock too.

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Reviewed by Ian R.
Verified Buyer
Rated 5 out of 5

Best Bang for Buck!

Nice, throaty exhaust that is not “rice-y” at all. Had to buy some new exhaust hangers to keep it from rattling around but other than that quick and easy to install

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Reviewed by Nicholas E.
Verified Buyer
Rated 5 out of 5

Exactly what I wanted.

The exhaust itself is an awesome value. It looks awesome on the car. The sound is exactly what I wanted. Deep with a little rasp under lighter load in the higher rpms. But throaty at full throttle. The angled outlet adds a nice look as well.

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Reviewed by Christopher, from United States
Verified Buyer
Rated 5 out of 5

It’s awesome

It’s pretty loud. I know a cop can hear me revving to 7k a mile away. But I love when it pops. My coworker said he saw flames from my exhaust when I blew past him on the highway. It’s awesome.

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Reviewed by Rob, from United States
Verified Buyer
Rated 5 out of 5

Good value

Great product well built. Sounds good it’s quiet but loud enough on a ca emissions car it’s not raspy from what I can tell and there’s no excessive drone on the highway with factory manifold primary cat and test pipe with 02s still intact. The tone is deep at idle but resembles stock just a hint deeper when you rev it out.

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Reviewed by Manuel M., from United States
Rated 5 out of 5

Mucho bueno

Best bang for your buck

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Reviewed by Gonzalo C., from United States
Rated 5 out of 5

Great exhaust!

Easy install , deep rumble at idle! I dont know about you guys but I like when the exhaust exits at an angle and this exhaust does that, obviously doesn’t smell the greatest because you’re deleting you cat but overall super clean and great sounding exhaust! Lots of pops and bangs!

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Reviewed by John R., from United States
Rated 5 out of 5

Good quality and sounds great (Not too loud)

So my main worry when buying this was too much drone or obnoxious when driving around town. After checking a few videos it didn't seem crazy so I made the jump. And its great! I can actually hear my car, makes awesome burp noses when shifting. Install was pretty easy, everything is included and took me about an hour. No check engine light or really any issues at all. I do need to go a bit slower over speed bumps and drive ways so keep that in mind depending on where you live.

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Reviewed by Jeremy H., from United States
Rated 4 out of 5

Good Quality

No catylitic converter in this, just a resonator. You could always go to an muffler shop before installing and have them swap the resonator out for a cat which would help with rasp and emissions. Exceptional welds, beautiful design, pretty loud with lots of pops, even comes with 02 adapter to prevent the CEL. Installing was the easy part, I cant say the same for the removal of the stock exhuast. The hangers where a bit loose but nothing has been clanging, new polyurethane ones probably fix this. All in all I love it even if it can be a bit raspy it's still nothing like that annoying civic almost every high schooler had. This thing turns heads till they see it's just a miata but anyways its what I've gather so far, hope this helps another buyer👍

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Reviewed by Tim A., from United States
Rated 5 out of 5

Solid Product

Very loud but has a great to it. Comes with all new hardware and was very easy to install. Fitment took a couple tries to get right with no exhaust leaks but that may have been entirely my fault, overall it's great for the price.

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