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

Learn More About Zip Valve™ Drop-In Repairs

More From This Category

MANLEY Valve, Race Master, Intake, 37.5mm Head Dia, 0.2355 in. Stem Dia, 4.722 Length, For Ford 5.0L, Each

MANLEY Valve, Race Master, Intake, 37.5mm Head Dia, 0.2355 in. Stem Dia, 4.722 Length, For Ford 5.0L, Each

$51.07

Sonnax Oversized Solenoid Switch Valve & Plug Kit, 40Tes/41Tes/42Le/42Rle/RFE, Each

Sonnax Oversized Solenoid Switch Valve & Plug Kit, 40Tes/41Tes/42Le/42Rle/RFE, Each

$103.01

MANLEY Valve, Severe Duty, Exhaust, 1.625 in. Head Dia, 0.3415 in. Stem Dia, 4.911 in. Length, SBC, Set of 8

MANLEY Valve, Severe Duty, Exhaust, 1.625 in. Head Dia, 0.3415 in. Stem Dia, 4.911 in. Length, SBC, Set of 8

$607.34

MANLEY Valve, Race Flo, Intake, 2.1 in. Head Dia, 0.3125 in. Stem Dia, 4.99 in. Length, For Chrysler HEMI, Set of 8

MANLEY Valve, Race Flo, Intake, 2.1 in. Head Dia, 0.3125 in. Stem Dia, 4.99 in. Length, For Chrysler HEMI, Set of 8

$400.37

MANLEY Valve, Severe Duty, Intake, 1.72 in. Head Dia, 0.3415 in. Stem Dia, 5.14 in. Length, SBC, Set of 8

MANLEY Valve, Severe Duty, Intake, 1.72 in. Head Dia, 0.3415 in. Stem Dia, 5.14 in. Length, SBC, Set of 8

$628.35

MANLEY Valve, Race Master, Exhaust, 1.615 in. Head Dia, 0.3136 in. Stem Dia, 5.23 in. Length, For Chevrolet LS7, Each

MANLEY Valve, Race Master, Exhaust, 1.615 in. Head Dia, 0.3136 in. Stem Dia, 5.23 in. Length, For Chevrolet LS7, Each

$51.07