Milltek Downpipe & Sports Cat for BMW 2 Series M240i Coupé (G42 XDrive - NAS Non OPF/GPF Models Only) (2022 onwards) – Improved Flow, Sports Catalyst
This is Milltek's large-bore downpipe with hi-flow sports cat for the BMW 2 Series M240i Coupé (G42 XDrive - NAS Non OPF/GPF Models Only). It replaces the restrictive factory downpipe with a larger-bore pipe fitted with a high-flow sports catalyst in place of the standard unit, using a less dense substrate that flows significantly better than the factory cat while still treating the exhaust gases passing through it.
It sits between a stock downpipe and a full de-cat: a genuine flow gain suited to a Stage 1 or Stage 2 remap, without giving up the catalyst entirely the way a de-cat pipe does.
In the UK, a replacement catalyst on a car first registered from 1 March 2001 needs ECE R103 type-approval to be road legal, so check the EC Approved line in the specification for the version you choose.
Specifications
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System Type: Large Bore Downpipe and Hi-Flow Sports Cat
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Pipe Diameter: 90mm (3.54")
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EC Approved: No
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Race System: No
Key Features
- Made from T304L aircraft-grade stainless steel, which is anti-magnetic and resists discolouration
- Mandrel-bent pipework keeps a constant diameter through every bend for unrestricted flow
- 90mm (3.54") pipework
- High-flow sports catalyst flows better than the dense factory unit while still treating exhaust gases
- Designed, developed and manufactured in the UK by Milltek Sport
Fitment
- BMW 2 Series M240i Coupé (G42 XDrive - NAS Non OPF/GPF Models Only) (2022 onwards)
- BMW 3 Series G20 M340i Sedan inc Xdrive (North American/ROW Models Only) Pre LCI (2021-2025)
- BMW 4 Series G22 M440i Coupe (NAS/ROW Vehicles Only) Pre LCI (2021-2025)
- Toyota/Lexus Supra A90 Coupe 3.0 Turbo (USA/ROW without OPF/GPF) - Both Auto & Manual Models (2019 onwards)
Not suitable for: the BMW 2 Series M240i Coupé (G42 XDrive OPF/GPF Models Only - Non Hybrid Pre LCI), which needs the Milltek Downpipe & Sports Cat BMW 2 Series M240i Coupé (G42 XDrive OPF/GPF - Non Hybrid Pre LCI) 22-25; the BMW 2 Series M2 Coupe (G87 S58 NAS Non-OPF/GPF Models), which needs the Milltek Sports Cat Downpipe BMW 2 Series M2 Coupe G87 S58 OPF/GPF 23+; the BMW 2 Series M2 Coupe (G87 S58 OPF/GPF Models), which needs the Milltek HJS Tuning ECE Downpipes BMW 2 Series M2 Coupe G87 S58 OPF/GPF 23+.
Installation
This work involves removing parts close to the turbo and engine, so we recommend fitting by a specialist with a ramp and suitable software support.
Upgrade Further
Also available from Milltek for this car: Milltek Active Valve Control BMW 2 Series M240i Coupé G42 XDrive OPF/GPF Non Hybrid Pre LCI 22-25, Milltek Cat-back Exhaust BMW 2 Series M240i Coupé (G42 XDrive - NAS Non OPF/GPF Only) 22+.
Will it fit the BMW 3 Series G20 M340i Sedan inc Xdrive (North American/ROW Models Only) Pre LCI?
Yes. Milltek lists this part for the BMW 3 Series G20 M340i Sedan inc Xdrive (North American/ROW Models Only) Pre LCI as well as the other models in the fitment list above.
Does it fit the BMW 2 Series M240i Coupé (G42 XDrive OPF/GPF Models Only - Non Hybrid Pre LCI)?
No. For that car, choose the Milltek Downpipe & Sports Cat BMW 2 Series M240i Coupé (G42 XDrive OPF/GPF - Non Hybrid Pre LCI) 22-25.
Is it road legal?
Milltek does not list EC approval for this part. Any exhaust used on the road must still meet noise and emissions rules, so check the requirements where you live.
Do I need a remap?
A suitable remap is strongly recommended, as the engine management needs to account for the change in flow and sensor readings. Speak to your tuner before fitting.
How is a sports cat different from a de-cat?
A sports cat still contains a catalyst, just a less dense one that flows better than the factory unit. A de-cat removes the catalyst completely.
What is it made from?
T304L aircraft-grade stainless steel, which is anti-magnetic and resists discolouration better than lower grades.
Is there a warranty?
Yes. Milltek products are covered against defects in materials and workmanship. Contact us with your order number if you have a problem.
