RoadsterSport Midpipe with Catalytic Converter and Resonator :: 99-05

INSTALLATION: See Forum Installation Section! INSTALL NOTES and CAUTION! Is your Ignition Coil weak or failing? The most common reason people buy this midpipe is that their 1999 or 2000 Miata midpipe converter has failed after 50,000 or more miles. The owners too often assume the failure is simple old age, when in fact the coils on the 1999 and 2000 are notorious for failure beyond 50,000 miles and when the coils get weak and start to fail the car will run too rich and destroy its catalytic converters! If you simply replace the midpipe and don't fix the failing coils then you can expect to quickly kill any replacement converter and that replacement will NOT be a warranty replacement. Therefore, please check your coils if your factory converters have failed and replace them BEFORE you install your new midpipe (we do sell the coils on this website). Also check plugs and plug wires. After the 2000 model year Mazda changed to a MUCH more reliable coil on plug setup.