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.

Achieve shorter shifts and increased torque capacity without creating low-speed harshness
Improved band and clutch holding capacity for increased durability
Progressive pressure increase as driving conditions become more demanding
All the benefits of increased line pressure without overloading the pump at idle
Drop-in Zip Valve™ parts install quickly and easily

Learn More About Zip Valve™ Drop-In Repairs

More From This Category

Motive Gear Differential Master Bearing Kit, Koyo, For Ford EXPEDITION 1997–1999, Kit

Motive Gear Differential Master Bearing Kit, Koyo, For Ford EXPEDITION 1997–1999, Kit

$461.53

MANLEY Connecting Rod Pin Bushing, Bronze, 1.100 in. OD, 1.033 in. ID, 1.175 in. Length, Set of 8

MANLEY Connecting Rod Pin Bushing, Bronze, 1.100 in. OD, 1.033 in. ID, 1.175 in. Length, Set of 8

$182.30

MANLEY Connecting Rod Pin Bushing, Bronze, 1.424 in. OD, 1.309 in. ID, 1.167 in. Length, Each

MANLEY Connecting Rod Pin Bushing, Bronze, 1.424 in. OD, 1.309 in. ID, 1.167 in. Length, Each

$22.80