M2 Motorsport 2.5″ Decat 370mm Mazda MX-5 NA

M2 Motorsport 2.5″ De-Cat 370mm for Mazda MX-5 NA

The M2 Motorsport 2.5″ de-cat replaces the 370mm catalytic converter in early Mazda MX-5 NAs. The decat necks up from 2″ on the downpipe end to 2.5″ on the rear end. The 2.5″ bore gives a substantial increase in volume over standard exhausts, suiting both naturally aspirated and forced induction cars.

Please measure the length of your catalytic converter before purchasing. Bolts directly to the downpipe, however, may not fit the standard cat-back exhaust.

The Mazda MX-5 NA came with three different catalytic converters:

89-93 370mm

94-97 440mm

Late 97 475mm