I paid $1200 for my s-type catback

expensive yes but I see no reason to ever change it and it is full stainless piping from the cats back. Full stainless mufflers which give them protection from the damaging elements
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Airaid CAI | Borla S-Type Catback | Amsoil 10w30 and MTG Trans. Fluid
382hp 387ft/lb | 1/4: 12.9 @ 112mph