Vehicles with Hyundai/Kia A4CF1, A4CF2 transmissions may exhibit insufficient line rise in the drive ranges and excess high pressures in Reverse. This may be caused by continuous oscillation of the boost valve within the sleeve, creating excessive wear and a path for EPC and Reverse pressures to leak. The Sonnax boost valve kit 84741-01K has upgraded wear-resistant materials and minimal clearance to prevent wear and restore proper hydraulic control. The two-spool lands have also been designed to provide more sealing engagement with the sleeve and annular grooves are added to hydraulically center the valve within the sleeve.

• Eliminates wear with minimal clearance, has greater sealing integrity and annular grooves to hydraulically center in the bore
• Hardcoat anodized valve combats premature wear
• Drop-in Zip Valve™ parts install quickly and easily