Masata BMW B58 Downpipe Decat (Catless/Cat Delete) SS304 TIG Welded Front Pipe Turbo Outlet - M140i M240i 340i 440i 540i 740i F20 F21 F22 F30 F31 F32 F33 F36 G30 G11 G12 - Stage 2 Ready, Direct Fit, Lifetime Warranty - MST0013

Masata B58 De-cat Front Pipe - Performance Turbo Outlet Upgrade for BMW M140i M240i 340i 440i 540i 740i - Part No. MST0013

Unlock serious power, torque and throttle response on your B58 with Masata’s free-flow de-cat front pipe. Crafted from premium 304 stainless with precision CNC-machined turbo flange, smooth mandrel bends and a robust flexi section, this race-proven turbo outlet maximises exhaust velocity for quicker spool, stronger mid-range and effortless top-end. Ideal hardware for Stage 2 mapping on the B58 platform with proven gains of 25 to 30 bhp when paired with an appropriate tune such as BM3 Bootmod3 Stage 2 OTS.

Built to last and built to perform. Each Masata unit is hand finished with TIG-welded seams for strength, heat resistance and leak-free reliability. The OEM-style flex bellows manages thermal expansion and reduces stress at the turbo flange for long-term durability. Direct bolt-on fit to the factory system and to aftermarket cat-back exhausts that use the original connection point.

We run this exact Masata B58 de-cat on our own cars at MJ Modifications and it delivers. Faster turbo response, a noticeable lift in performance once mapped and excellent build quality. Our customers love the fitment, the finish and the value for money from this MST0013 performance pipe.

Why enthusiasts choose this Masata B58 upgrade

• High-flow straight-through design for maximum gas speed and reduced backpressure
• 304 stainless steel body with CNC turbo flange for precise sealing and durability
• TIG-welded construction with additional reinforcement at critical points
• OEM-style flex joint manages heat cycles and vibration for reliability
• Plug-and-play fit with stock cat-back and performance exhausts that fit the OE position
• Stage 2 ready with typical 25 to 30 bhp improvements when tuned
• Backed by Masata Lifetime Warranty
• Part number: MST0013

Vehicle fitment

BMW M140i and M140i xDrive - F20 F21
BMW M240i and M240i xDrive - F22
BMW 340i and 340i xDrive - F30 F31
BMW 440i and 440i xDrive - F32 F33 F36
BMW 540i and 540i xDrive - G30
BMW 740i and 740i xDrive - G11 G12

Perfect for B58 tuning and hardware stacks

A must-have B58 Stage 2 hardware item that complements performance remaps, intake upgrades and cat-back systems. Ideal for drivers searching for M140i decat pipe, M240i front pipe, 340i turbo outlet, 440i exhaust upgrade, 540i performance pipe, 740i B58 de-cat and B58 Stage 2 hardware UK.

Installation and fitting

Professional installation recommended. For fitting, book with MJ Modifications in Warwickshire. Request a quote via info@mjmodifications.co.uk. We also recommend replacing the downpipe gasket during installation.

Compatibility check

For peace of mind, we can verify fitment before dispatch. Add your UK registration or the last 7 digits of your VIN at checkout and we will confirm compatibility.

Manufacturer and warranty

Manufactured by Masata
Covered by the Masata Lifetime Warranty

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