Sonnax Line Pressure Boost Valve Kit

The Sonnax Line Pressure Boost Valve Kit line (also called line pressure booster kits or transmission boost valve kits) gives automatic transmission builders and rebuilders a drop-in way to restore or increase line pressure. The kits are made for valve body and pump applications. Choose the kit that matches your transmission.

Key Features:

• Large-ratio boost valves raise pressure incrementally, when the transmission needs it most
• Stronger pressure regulator springs, about 10% stronger than OE and more conservative than other aftermarket kit springs, are included in the booster kits
• Gives shorter shifts and more torque capacity without low-speed harshness
• Better band and clutch holding capacity for durability
• Raises line pressure without overloading the pump at idle
• Drop-in Zip Valve parts install quickly and easily, with no special tools or reaming on many applications

Related Sonnax boost valve kits are made for worn boost valve and sleeve bores. They use upgraded materials, such as wear-resistant billet aluminum sleeves and hardcoat anodized valves. These parts help prevent leakage and restore proper line pressure control.

Sonnax is a well-known name in transmission valve body repair and performance parts. Each kit comes with installation instructions for its application.