700R4 4L60 Transmission Sonnax Line Pressure Booster Kit 700R4-LB1

Sonnax 700R4 4L60 Line Pressure Booster Kit for GM

Sonnax hydraulic line pressure booster kits contain stronger pressure regulator springs

and large ratio boost valves designed to work together to provide progressive pressure

increases as driving conditions become more demanding.

Sonnax pressure regulator springs are approximately 10% stronger than OE and more conservative

in impact than other aftermarket “kit” springs. Large ratio boost valves provide higher pressure

incrementally and when it is needed the most.

The combination of these springs and valves in a Sonnax kit gives you the best of both worlds:

a modest pressure increase at the low end, with a high-end pressure that is equal to or

greater than that of other aftermarket “kit” springs.

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