WARNING: This product can expose you to chemicals that are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, visit www.P65warnings.ca.gov.The Dinan Free Flow Axle-Back Exhaust (D660-0078-BLK) is a premium acoustic and flow upgrade for the 2017-2023 BMW 540i (G30), engineered to enhance the B58 engine's performance. By reducing back pressure, this system delivers a verified increase of +6HP and +5LB-FT of torque at 6600RPM. The result is an intoxicatingly sporty sound, complete with additional burbles and pops. Cabin civility is retained courtesy of an integrated Helmholtz chamber design that specifically reduces resonance or "drone" at low RPM. The factory computer-controlled valve is eliminated for maximum flow and sound at all times.
Features:
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Verifiable Power Gains: Delivers an increase of +6HP and +5LB-FT of torque at 6600 RPM.
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Advanced Drone Abatement: Integrates a Helmholtz chamber to reduce cabin resonance, providing an enjoyably louder, sportier sound that includes aggressive burbles and pops.
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Superior Material & Construction: Built from 100% 16 gauge 304 stainless steel to resist corrosion and ensure long-term durability.
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Aesthetic Excellence: Finishes with twin, massive quadrilateral, black ceramic coated tips (over 8" wide, 4" high) with laser engraved logos, providing a highly aggressive rear demeanor.
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Flow Optimized: The factory computer-controlled valve is eliminated for maximum flow and sound at all times.
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Fitment Integrity: Built to exacting specifications using the factory brackets and hangers for a guaranteed, factory-like fitment.
Product Contains:
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(1) Dinan Axle-Back Muffler Assembly
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(2) Twin Quadrilateral Black Ceramic Coated Tips
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(1) Complete Installation Hardware Kit
Warranty This product is supported by a Manufacturer's Warranty. Note: Manufacturer warranty terms are subject to change.
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