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.
Our 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.
The Prescription for Optimum Pressure