Sale

ISR

Circuit Spec Exhaust System

$605.00 $574.75 Save $30.25

SKU: IS-CSEXH-NA

In Stock
In Stock
Ships by Aug 29
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

The system utilizes 2.5-inch brushed stainless steel piping and flanges, paired with a polished stainless steel muffler that terminates in a 4-inch tip. This design aims to provide a louder and more aggressive exhaust note. Specifically engineered for OBD1 and OBD2 1.8L NA Miata models, this exhaust system includes a secondary O2 bung for sensor compatibility. ISR Performance explicitly states that this Circuit Spec listing is for the 1.8L engines; 1.6L Miata owners should refer to the separate 1.6L Circuit Spec listing. The mid and tail sections are standard, with no variations available.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Available on iOS & Android

Specifications

BrandISR
Part NumberIS-CSEXH-NA
CategoryExhaust

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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