PCZ Performance 4.5" High-Flow Catless Downpipe – BMW F & G Series B58 (M240i, 340i, 440i, 540i, 740i)
Have a question about fitment, installation or delivery? Call or text us on 0457 132 040
We deliver Australia-wide from our Melbourne warehouse. Free local pickup is available from our Melbourne workshop, and professional installation is also available. Please contact us for installation pricing and bookings.
KEY FEATURES
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Engineered for refined performance
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Professional installation available
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In stock ready to deliver
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Quality tested by us
Maximize turbo spool and exhaust gas velocity on your B58 3.0L inline-six. The factory catalytic converter features a restrictive core that bottlenecks exhaust flow immediately at the turbo exit, building excess heat and suffocating power. The PCZ Performance 4.5" High-Flow Catless Downpipe replaces the OEM unit with an oversized, smooth-mandrel bend design that drastically drops backpressure and lowers exhaust gas temperatures (EGTs).
Engineered specifically for Stage 1, Stage 2, and custom flex-fuel tuning calibrations, this oversized 4.5" downpipe speeds up turbo response, sharpens throttle feel, and builds strong mid-range torque. Beyond power gains, it delivers a deep, aggressive exhaust note with pronounced overrun burbles and crisp upshift snaps under heavy acceleration.
Constructed from heavy-duty, TIG-welded T304 stainless steel with precision CNC-machined V-band flanges, it guarantees a direct, leak-free bolt-on fitment. Finished with a laser-engraved brushed stainless PCZ Performance plaque riveted onto the main body for genuine build authentication.
Package Includes
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1x PCZ Performance 4.5" Stainless Steel B58 Catless Downpipe (Welded PCZ Badge)
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High-Temp Exhaust Gasket & Installation Hardware
We ship Australia-wide using premium couriers to ensure your mods arrive safe and fast.
- Dispatch: 1–5 Day Turnaround
- Transit: 4–10 Business Days (Regional may vary)
- Secure: Signature on delivery available for high-value carbon parts.
- Local: Shipping directly from our Victoria warehouse.
Important: Please inspect your parts and report any transit damage within 48 hours so we can fast-track a resolution for you.
Specifications
Detailed specifications for the PCZ Performance 4.5" High-Flow Catless Downpipe – BMW F & G Series B58 (M240i, 340i, 440i, 540i, 740i)
We offer professional fitment, installations and modifications at our workshop for all parts and models. Weather you want a part installed or a full custom modification, we can help.
We are the home of the Euro meet. Because we are so deeply embedded in the community, we know the trends before they happen. When you choose PCZ, you aren't just a customer—you're joining a family of enthusiasts who value prestige, performance, and the perfect drive.
We offer professional fitment, installations and modifications at our workshop for all parts and models. Weather you want a part installed or a full custom modification, we can help.
We are the home of the Euro meet. Because we are so deeply embedded in the community, we know the trends before they happen. When you choose PCZ, you aren't just a customer—you're joining a family of enthusiasts who value prestige, performance, and the perfect drive.
Contact Us
Contact us for installation, fitment or any additional specifications about this PCZ Performance 4.5" High-Flow Catless Downpipe – BMW F & G Series B58 (M240i, 340i, 440i, 540i, 740i)
