S63 BMW F90 M5 DOWNPIPES with HIGH FLOW CATSDescription Stainless down pipes for the S63 powered F90 M5. Previous sets were made for a customer and thoroughly tested. More exhaust sound and improved flow. If you're only going to make one exhaust modification, this should be the one. Fully catted with high flow catalysts. No need for O2 simulators. Fully heat shielded to help lower engine temps and keep the energy in the exhaust. Mounting hardware included. *Shipping within the continental US
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