Circuit Spec Exhaust System

The ISR Performance Circuit Spec Exhaust is engineered as a two-piece system specifically for the 1999-2005 Mazda Miata NB. The exhaust utilizes 2.5-inch diameter piping constructed from brushed stainless steel, providing durability and a sleek appearance. It culminates in a polished stainless steel muffler featuring a prominent 4-inch tip, designed to enhance the vehicle's auditory and visual appeal. This exhaust system includes all necessary hardware for installation, such as 2x 2.5-inch exhaust gaskets, bolts, and nuts. However, it is crucial to note that this product is explicitly stated as being legal only for use in competition vehicles that will not be registered or used on public streets or highways. Furthermore, ISR Performance has not tested this exhaust on the turbo Mazdaspeed model, indicating potential compatibility issues or untested performance characteristics for that specific variant.