Sonnax 104520-12K 6L45, 6L50, 6L80, 6L90 Transmission Pump Boost Valve Kit tools Servo and piston made from

Servo and piston made from durable billet aluminum

Whether you are removing your transmission or if you are trying to fix your leaking dipstick / oil fill tube

This driver set can be used on the 1 or 2 piece style direct drum bushings

SHORT-CRISP-SMOOTH upshifts and kickdowns

Billet aluminum resists wear

Sonnax 104520-12K 6L45, 6L50, 6L80, 6L90 Transmission Pump Boost Valve Kit tools Servo and piston made fromBrand: Sonnax Type: Performance Pump Component Interchange Part Number: 80289NK,45507ATK Items Included: Boost valve kit Manufacturer Part Number: 104520 12K Material: Aluminum Universal Fitment: Yes Vintage Part: No Performance Part: Yes 6L45, 6L50, 6L80, 6L90 Transmission Boost Valve Kit Part No. 104520 12K Vehicles with listed GM transmissions may exhibit insufficient line rise in drive ranges, soft shifts and or burnt clutches. These problems may