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BMW M340i M440i 540i B58 G Series 200 Cell Heat Shielded Sports Cat Downpipe (G20 G21 G22 G23 G30 G31) High Flow Stainless Performance Exhaust Upgrade
BMW M340i M440i 540i B58 G Series 200 Cell Heat Shielded Sports Cat Downpipe (G20 G21 G22 G23 G30 G31) High Flow Stainless Performance Exhaust Upgrade
Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.
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BMW G Series B58 200 CPSI Heat Insulated High-Flow Catted Turbo Outlet Pipe
Transform the response and soundtrack of your turbocharged straight six with this heat insulated 200 CPSI high-flow catted turbo outlet for the BMW B58. Built from quality stainless steel with a generous 4.5 inch catalyst body, it is designed to move exhaust gases quickly while the integrated thermal shielding helps control under-bonnet temperatures. Expect a richer, deeper exhaust note and a sharper feel on the throttle without an intrusive drone.
Perfect for enthusiasts seeking a premium catted front section for G-chassis models who want the performance character typically associated with a decat but with a quality sports catalyst retained. We have installed this on customer cars and feedback on fit, finish and tone has been excellent.
Highlights
- 200 CPSI high-flow sports catalyst for B58 turbo applications
- Large 4.5 inch canister promotes strong gas velocity and rapid spool
- Integrated heat insulation to help reduce engine bay heat soak
- Stainless steel construction with smooth transitions for improved flow
- Deep, refined sound character without excessive cabin boom
Compatible vehicles
Engineered for the BMW G Series with the B58 petrol engine, including:
- 3 Series M340i G20 G21
- 4 Series M440i G22 G23
- 5 Series 540i G30 G31
Why choose this upgrade
- Freer flowing than the factory catalyst for a more responsive drive
- Cleaner turbo tone and strong spool characteristics
- Proven by us and our customers for sound quality, fit and durability
Fitting and support
Professional installation recommended. MJ Modifications offers expert fitting in Warwickshire. Email info@mjmodifications.co.uk for a quotation and booking.
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Notes
Intended for motorsport and off-road use in some regions. Please check local laws and MOT requirements before purchase and installation.
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