Wear at the inboard end of the boost regulator bore in VW/Audi 01M, 01N and 01P units can reduce the ability of EPC/TV pressure to stroke this valve open. Full boost exiting this valve combines forces with the main regulator spring, increasing line pressure. Sonnax oversized boost regulator valve kit 119940-05K allows the valve bores to be refurbished.

Hardcoat anodized aluminum valve combats premature wear
A replacement ratcheting end plug is included, as the OE one often breaks
An adjustment tool is provided in tool kit F-119940-TL5 for repeated assembly, disassembly and adjustment of the ratcheting end plug

More From This Category

MANLEY Valve, Titanium, Intake, 2.08 in. Head Dia, 0.3415 in. Stem Dia, 5.04 in. Height, Each

MANLEY Valve, Titanium, Intake, 2.08 in. Head Dia, 0.3415 in. Stem Dia, 5.04 in. Height, Each

$302.72

COMP Cams Valve, Sportsman, Stainless Steel, Intake, For Chevrolet Small Block, 2.020 in. Head, 5.011 in. Length, Set of 8

COMP Cams Valve, Sportsman, Stainless Steel, Intake, For Chevrolet Small Block, 2.020 in. Head, 5.011 in. Length, Set of 8

$246.30

MANLEY Valve, Extreme Duty, Exhaust, 2.06 in. Head Dia, 0.3415 in. Stem Dia, 6.7 in. Length, Gen II, Each

MANLEY Valve, Extreme Duty, Exhaust, 2.06 in. Head Dia, 0.3415 in. Stem Dia, 6.7 in. Length, Gen II, Each

$139.15

MANLEY Valve, Titanium, Intake, 2.15 in. Head Dia, 0.3415 in. Stem Dia, 5.64 in. Height, Set of 8

MANLEY Valve, Titanium, Intake, 2.15 in. Head Dia, 0.3415 in. Stem Dia, 5.64 in. Height, Set of 8

$2,564.57

MANLEY Valve, Race Flo, Exhaust, 28.5 mm Head Dia, 5.5 mm Stem Dia, 102.70 mm Length, For Honda, Each

MANLEY Valve, Race Flo, Exhaust, 28.5 mm Head Dia, 5.5 mm Stem Dia, 102.70 mm Length, For Honda, Each

$50.05

MANLEY Valve, Severe Duty, Exhaust, 1.88 in. Head Dia, 0.3715 in. Stem Dia, 5.354 in. Length, BBC, Set of 8

MANLEY Valve, Severe Duty, Exhaust, 1.88 in. Head Dia, 0.3715 in. Stem Dia, 5.354 in. Length, BBC, Set of 8

$607.34