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The Wagner Tuning head stud set for Audi S4 (B9) M11 is a burnished upgrade kit that replaces factory studs to secure the cylinder head and preserve proper clamping. It’s specified as an upgrade head stud set in the product name and provides a durable, finished appearance while serving as a direct replacement option for engine rebuilds or performance builds.
Wagner Tuning Audi S4 B9 M11 Upgrade Head Stud Set - Burnished
