Get the exhaust growl your car should have came with from the factory!
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BMW G23 M440i B58 3.0L Performance Exhaust Parts & Upgrades
Get the exhaust growl your car should have came with from the factory!
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Stay ahead of the competition with the performance gains that you'll receive from this sport exhaust system.
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Manually and automatically adjust the exhaust sound level
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Control your Varex valve with the press of a button
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2.5" Inlet - 4.0" Outlet - 1x1 Carbon Fiber Sleeve
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Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
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3.0" Inlet - 3.5" Outlet - Forged Carbon Sleeve
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This product was last offered at the strikethrough price on
05-19-2026
Includes all of the Dinan essentials to improve your BMWs power, handlings, and feel
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For vehicles with the B58TU (B58D) engine only
2.5" Clamp-on Inlet / 4.0" Single Wall, Slant Cut Outlet
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Not vehicle specific. You MUST measure prior to purchasing!
This product was last offered at the strikethrough price on
05-02-2026
Weighs 21.7 kg, which is 23% lighter than stock. Power gains of 11.8 hp at 5,600 rpm and torque increases of 17.1 Nm at 4,100 rpm were recorded when tested on the Akrapovic
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms