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.Elevate your G20 M340i or G22 M440i to new heights of performance and presence with the Dinan Free Flow Axle-Back Exhaust System featuring bold black ceramic quad tips. Engineered specifically for the potent B58-powered M340i/M440i, this system delivers the unmistakable look, sound, and feel of true M-performance heritage.
For the first time ever, Dinan introduces quad exhaust tips to a non-M model—because these powerful “M-lite” machines have earned it. The factory valance supports this bold aesthetic perfectly, allowing four massive 102mm straight-cut tips to make a definitive statement on the street or at the track.
Built from premium TIG-welded T304 stainless steel with brushed piping and a stunning finish, this axle-back exhaust doesn’t just look the part—it performs it. Larger 76mm (3") piping replaces the stock 70mm diameter, enabling increased exhaust flow and a richer, more aggressive exhaust note.
Unlike the factory's single-valve layout, Dinan’s system incorporates a dual electronic valve design that actively controls sound and flow:
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Valves open: a freer-flowing, straight pipe like sound through the outer tips, with a deep and meaty tone.
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Valves closed: all gases are routed through the muffler and out the inner tips, providing a refined and quiet cabin experience.
Designed with Dinan’s renowned drone-abatement technology, this system ensures highway comfort and interior civility even while delivering head-turning performance when desired.
Key Features:
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Fits BMW G20 M340i & G22 M440i models
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Quad 102mm black ceramic-coated exhaust tips with laser-engraved Dinan logo
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Dual electronic valve system for dynamic sound control
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Straight-through 76mm (3") mandrel-bent T304 stainless steel construction
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Signature Dinan straight-cut tip design
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TIG-welded for strength, durability, and show-quality finish
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Aggressive tone under throttle, tame when cruising
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Retains full use of factory valance—no modifications required
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Made in the USA
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