MFactory K20 Pro Series 1-4 Drag Gear Set F20C 1999-2000 Civic Si with the

1999-2000 Civic Si with the case ID of "S80" "YS1""Y21" or "S4C"

Programmable center LED is 87% larger than original AEM gauges

91212PE0662

IS140-1650H - Scion Fuel Injector Clinic Injector Set: 4x1650cc Saturated / High Impedance Ball & Seat Injectors

Ignition Timing

MFactory K20 Pro Series 1-4 Drag Gear Set F20C 1999-2000 Civic Si with theThese K Series gears are a direct swap for the OEM 1 4 K20 6 speed gears and can be used with OEM synchros or Synchrotech Carbon Synchros. They are designed with a longer 1st and close ratios 1 4 for a better launch and reduced RPM drop during shifts. The OEM 5th and 6th gears can be reused for highway cruising. The gears are hardened and super sub zero cryo treated for increased strength. Ratios: 2. 313 1st, 1. 650 2nd, 1. 304 3rd, 1. 080 4th