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SHORT-CRISP-SMOOTH upshifts and kickdowns
Magna Case Model 273 - Chevy Kodiak / GMC 4500/5500
Servo and piston made from durable billet aluminum
060" thick steels
The shim installs between the drum and the OE shim
Sonnax 104520-12K 6L45, 6L50, 6L80, 6L90 Transmission Pump Boost Valve Kit tools SHORT-CRISP-SMOOTH upshifts and kickdownsBrand: 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
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