Audi A8 S4 RS6 4.2L 40v V8 Supertech Intake Valve Set (Single Groove)
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Audi A8 S4 RS6 4.2L 40v V8 Supertech Exhaust Valve Set (Single Groove) is a performance exhaust valve for Audi A8 S4 RS6 4.2L 40v V8 applications.
Suitable for performance engine builds and cylinder head upgrades where reliable valve train control and correct fitment are important.