Sonnax 27741-08K Oversized Pressure Regulator Boost Valve Kit

The Sonnax 27741-08K oversized pressure regulator and boost valve kit features upgraded materials and extremely tight tolerances to restore and maintain proper hydraulic control in Toyota and Lexus automatic transmissions. This kit addresses issues in U151E, U151F and U250E transmissions that may exhibit insufficient line rise in the drive ranges, excessively high pressures in Reverse and shift issues.

Key Features:

• Hardcoat anodized aluminum valves combat premature wear
• New spring is included to work with the oversized valve and re-establish OE regulated pressure specifications
• Kit includes an increased ratio boost valve assembly specially designed to work with the oversized regulator valve
• Addresses pressure regulator valve and boost valve wear caused by continuous oscillation

This complete kit provides a durable solution for restoring proper line pressure control and eliminating common shift quality issues in affected Toyota/Lexus transmissions. Professional installation and proper reaming tools are required for correct fitment.