Sonnax Honda Acura 4 Spd 3 Shaft or 5 Spd O-Ringed End Plug Kit For units with dual linear solenoids. Valve bore plugs on Honda/Acura 4-speed, 3-shaft, and 5-speed valve bodies wear and allow critical CPC and solenoid feed oil to leak to exhaust, leading to low CPC pressures and soft or inconsistent shifts. Sonnax O-ringed end plug kit 98892-01K replaces the worn OE end plugs and restores critical circuit pressures. See instructions for details on end plug bore fitment.