{"product_id":"circuit-spec-exhaust-system","title":"Circuit Spec Exhaust System","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.\n\nSpecifically 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.","brand":"ISR","offers":[{"title":"Default Title","offer_id":52688956784952,"sku":"IS-CSEXH-NA","price":574.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687906727.webp?v=1784899232","url":"https:\/\/store.motormia.co\/products\/circuit-spec-exhaust-system","provider":"MOTORMIA","version":"1.0","type":"link"}