ISR Performance Mazda Miata NA Circuit Spec Exhaust-(1994-1997)

The ISR Performance Circuit Spec Exhaust for the 1994-1997 Mazda Miata NA is a two-piece catback built for the 1.8L NA Miata. 2.5" brushed stainless front pipe with precision flanges transitions through a standard midsection and tail section to a polished stainless muffler with a 4" tip. Comes with a secondary O2 bung, which is the practical difference that makes it work on both OBD1 and OBD2 Miatas without weld-in fittings.

What It Does

Catback replacement for the 1.8L NA Miata. The 2.5" piping flows substantially better than the choked factory exhaust, the brushed stainless construction holds up to weather and heat cycling, and the polished muffler with 4" tip gives the NA a proper aftermarket sound without going obnoxiously loud. The pre-fitted secondary O2 bung handles OBD2 NA Miatas (which have a downstream O2 sensor) without requiring a fabricator.

Fitment

1994-1997 Mazda Miata NA (1.8L naturally aspirated) only. Tested on both OBD1 and OBD2 Miatas. Will not fit Euro-market Miatas. Not designed for the earlier 1.6L Miata (1990-1993).

What's in the Box

• 1x 2.5" brushed stainless front pipe with precision flanges
• 1x midsection
• 1x tail section with polished stainless muffler and 4" tip
• Secondary O2 bung (pre-fitted)

Product Details

Brand: ISR Performance

Part Number: IS-CSEXH-NA

Type: Circuit Spec catback exhaust (two-piece)

Vehicle Fitment: 1994-1997 Mazda Miata NA (1.8L naturally aspirated, US market)

Excluded: Euro-market NA Miatas, 1.6L NA Miatas (1990-1993)

OBD Compatibility: OBD1 and OBD2 (secondary O2 bung included)

Material: Brushed stainless steel piping, polished stainless muffler

Piping: 2.5" front pipe

Tip: 4"

Sold: Complete kit

Legality: Off-road and competition use only