BMW 6-Series F1X 640/640i MBS Stainless Steel & Titanium Valved Exhaust System Available Coupon Code:"M3List" (Enter manually at checkout) which significantly improves the performance

which significantly improves the performance of your vehicle

You will need to drill 2 holes into the speaker shelf

This will ONLY fit F chassis 2

Premium protective air filter covers are provided to ensure you can keep your filters clean from debris if needed

This unit mounts where the rear seats would be in a standard BMW M4

BMW 6-Series F1X 640/640i MBS Stainless Steel & Titanium Valved Exhaust System Available Coupon Code:"M3List" (Enter manually at checkout) which significantly improves the performanceOur valved exhaust systems are precisely crafted to produce the best possible tone from your vehicle. Our valves are designed properly to ensure you have full control of your exhaust system. We utilize premium materials to fabricate our systems and we design them so your vehicle has proper airflow with the valves opened and closed. Click "Purchase Here" to see pricing on both stainless steel & titanium exhaust options. Exhaust Features Vacuum exhaust