ISR Performance Circuit Spec Exhaust For Mazda Miata NB (1999-2005) | Performance Exhaust System

Miata NB owners (1999-2005), want to unlock a better sound and improved performance? This ISR Performance Circuit Spec Exhaust is built for exactly that. It’s a brand new, unused exhaust system that comes in its original packaging — ready to bolt onto your Mazda Miata. ISR is known for making quality performance parts, and this exhaust is designed to enhance flow, reduce backpressure, and give your Miata a more aggressive tone without being obnoxious. The “Circuit Spec” suggests it’s tuned for spirited driving, track days, or just making your daily drive more engaging. Made from durable materials, it should be a direct fit for your NB chassis. Installation typically requires basic tools and some mechanical know-how, or you can have a shop handle it. Whether you’re prepping for autocross, upgrading your street car, or just want your Miata to sound as good as it drives, this exhaust is a solid choice. Feel the power bump and enjoy the soundtrack. Let your Miata roar with ISR performance!