Apexi makes a 60mm, N1 Evolution exhaust for NA 1990-1997 Miata's. Contact for pricing.

The N1 Evolution combines all the racing heritage and proven performance of the original N1 muffler but raises the ante by adding light weight, fully polished stainless steel piping. This is the ultimate N1 exhaust system. Mandrel bent, full stainless steel construction provides maximum power gains and resistance to rust or other damage caused by weathering. Like the original N1, the N1 Evolution uses the minimum amount of pipe bends to allow for greater exhaust flow. The N1 Evolution was created for those who are looking for something one step further than the classic N1 design. Available only for a select amount of vehicles, the N1 Evolution stands as a brilliant testament to exhaust system fabrication. * Please note that, due to the tapered tip of the N1 Evolution exhaust system the ATS Silencer WILL NOT fit properly. This is only true for the N1 EVOLUTION mufflers, all other exhaust systems will fit without problems.

5Zigen has an incredible line of exhaust sytems for NA, NB, and NC miata's. They have four different exhaust systems

The first exhaust system is the Pro Racer ZZ series. Made entirely of stainless steel, it is rated at under 94db, while still giving a nice performance boost. This exhaust is available for all years of miata / MX-5.

The second exhaust is the 5zigen A-Spec. Like the ZZ series, it is rated at under 94db, but the rear section of the exhaust is made of stainless steel and inconel 600, an extremely high heat resistant metal. This has a titanium like look on the end. This system as also available for all year miata / MX-5.

The third exhaust system is the Miracle Fireball series. Weighing about 50% less then the stock exhaust system, it also uses the straightest possible path. Available for the 1989 to 2005 miata.

The fourth exhaust is the Border304 Speed system. This is a race spec exhaust system that utilizes the absolute straightest line possible. Perfect for turbo / supercharged setups. Available for the 1989 to 2005 miata.

Greddy's Ti-C exhaust line is a well made exhaust, that is rated less then 94db. It is available for these years: 1.6L 1989-1993, 1999-2005 1.8, and 2006+ MX-5.

Magnaflow makes a catback exhaust for all years, including the Mazdaspeed turbo edition. The 1989-1997 system is a basic 2.25" system. The catback for the 1999-2005 regular model, and the Mazdaspeed, is 2.5". They make a dual tip model for 2006+