Stainless Steel Racing Catalyst, B9/B9.5 Audi S4/S5.

[FIT] · Confirm fitment

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Carbuildr matches every part against your vehicle's year, sub-model, and trim. Green ✓ means it fits. Yellow ⚠ means it fits with a note (modify required, year-specific revision, etc). Red ❌ means it's incompatible. Always double-check vendor-claimed fitment before purchasing.