Milltek GPF/OPF Bypass Pipe for BMW M240i Coupe (G42 xDrive, OPF/GPF Models) 2022+ | Fits Milltek Sport Exhaust | Requires OPF/GPF Bypass Module or Stage 2 ECU | SSXBM1233 | Track Use Only

SSXBM1233 High-Flow Particulate Filter Delete Section for BMW M240i G42 xDrive

Wake up the B58 soundtrack and free up exhaust flow on your BMW M240i G42 all-wheel drive with this Milltek high-flow filter delete section, part number SSXBM1233. Designed to join directly to a Milltek Sport system on petrol particulate filter equipped models, this straight-through section removes the restriction of the factory PPF to deliver a harder-edged note, quicker turbo spool and a more responsive feel on track.

• Direct connection to Milltek Sport cat-back on G42 M240i xDrive
• For petrol particulate filter equipped cars from 2022 onwards
• Constructed from premium T304 stainless for durability and corrosion resistance
• Mandrel-formed bends for smooth, uninterrupted gas velocity and reduced backpressure
• Deeper, richer sound without the muted factory tone
• Ideal for track days, club motorsport and performance builds
• Part number clearly stamped: SSXBM1233

Why enthusiasts choose it

Owners of the G42 platform want that classic B58 character to shine through. This Milltek section delivers a freer-flowing path for the exhaust stream, sharpening throttle response and letting your Milltek system really sing. Built in Britain from quality materials, it is a robust, precision-fit upgrade that complements tuning packages and supports higher performance goals on closed-course use.

Compatibility

• Vehicle: BMW M240i Coupé G42 xDrive, B58 engine
• Years: 2022 onward
• System pairing: fits a Milltek Sport exhaust system only
• Part reference: SSXBM1233

Required electronics

To run correctly, the car must be fitted with an OPF/GPF bypass module or calibrated with a Stage 2 ECU map. This prevents fault codes and ensures the vehicle operates as intended for track use.

Built to last

Milltek manufactures in the UK using T304 austenitic stainless. The constant-radius pipework maintains diameter through each bend, helping preserve flow and minimising pressure drop. The result is a clean, motorsport-inspired tone and reliable performance lap after lap.

Fitting service

Professional installation is recommended. MJ Modifications offers supply and fitting in Warwickshire with experienced technicians who know BMW G-series platforms. For a fitting quote or to book your slot, email info@mjmodifications.co.uk.

Important notes

• For vehicles equipped with a petrol particulate filter and paired with a Milltek Sport system
• Requires an OPF/GPF bypass controller or Stage 2 ECU software
• Intended for off-road and track use only where regulations allow

What our customers say

We run this setup on customer cars and the feedback is consistently positive. Stronger tone, better response and a more engaging drive on circuit. If you want your M240i to sound like it should, SSXBM1233 is a proven choice.

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