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Manufacturer Part No: 390004S020
ISF (superfinishing) improves strength and reliability by significantly reducing the surface roughness in order to eliminate stress raisers on the surface
Requires professional installation and special tooling to avoid damaging the bushings or the housing
The drain plug is bottom facing for superior oil drainage
Forester XT MY03-13
AVCS Oil Control Valve 10921AA080 8100 Manufacturer Part No: 390004S020The AVCS intake oil control valve (solenoid) controls oil flow to the camshaft sprocket as part of the variable valve timing (VVT) system. It installs into the cylinder head's front cam bearing cap assembly. A sticking or faulty oil control valve may set a fault code and require replacement. The AVCS (Active Valve Control System) is used by Subaru to vary the camshaft timing in order to improve efficiency and reduce emissions across the rpm range. The
