S4  There are 7 products.

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 APR Stage 2+ Supercharger Pulley Install Kit -...

£308.94
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Carbonio Stage 2 Intake Upgrade - Audi S4 B8...

£322.40
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Audi S4 A6 2.7T Performance Package

£1,624.48
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APR PEX Intake System - 3.0T Audi S4 / S5 (B9)

£559.32