Sonnax 6L80-LB1, 6L45 / 6L50 / 6L80 / 6L90 Line Pressure Booster Kit

Sonnax hydraulic line pressure booster kits have stronger pressure regulator springs and big ratio boost valves that work in tandem to offer progressive pressure increases when driving conditions deteriorate.

Our pressure regulator springs are 10% stronger than OE and have a lower impact than other aftermarket “kit” springs. Large-ratio boost valves deliver increased pressure slowly and when it is most needed. When these springs and valves are combined in a Sonnax kit, you get the best of both worlds: a moderate pressure boost at the low end with a high-end pressure that is equivalent to or greater than that of other aftermarket “kit” springs.

The Optimal Pressure Prescription:

At idle, stronger pressure regulator springs raise pressure in equal amounts.

• Kit fits all 6L45–6L90 applications
• 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