The big-flow option for an early NA: ISR's 415 lph E85-compatible pump kit for the 1989-1993 Miata. Pick this over the 340 lph version when the build sheet actually calls for it — high-power boosted cars and E85 builds that would outrun a 340. For a mild street build, the 340 is usually the right call; buy the pump your fuel demand needs.

Like the 340, it's application-specific for the 1989-1993 chassis, uses composite impellers for corrosion protection on ethanol, and ships with its installation kit and filter. Make sure the rest of the fuel system — lines, injectors, regulator — is sized and rated for the flow and the fuel.

• Fitment: 1989-1993 Mazda Miata (NA), application-specific
• 415 lph flow rate
• E85 compatible; composite impeller construction (per ISR)
• Includes: 1x fuel pump, 1x installation kit with filter