The Walbro 190lph fuel pump replaces the OEM fuel pump. This is a "high pressure" Walbro F20000141 fuel pump which will fit all 1990-2005 Mazda Miata's with the exceptions of the installation hardware and electrical connectors.
All 1999-2005 (including MSM) will require the Walbro 400-1092 install kit with the Walbro pump. The electrical connectors are different from the new fuel pump to the OEM clip.
The 1990-1997 Miatas can install the fuel pump without the install kit. However mounting is easier with the install kit due to the new grommet. Most people also want to replace the small filter bag as the ethanol in fuel tends to deteriorate the original bag
Note that this is the pump ONLY - the strainer, electrical connectors, etc. are not included. The install kits can be found separate on our site in the Fuel and Ignition Category from our homepage