Milltek GPF/OPF Bypass for BMW 3 Series F80 M3, M3 Competition & M3 CS Saloon (OPF/GPF Models Only) (2019-2020) – Filter Delete, Motorsport Use
This is Milltek's GPF/OPF bypass pipe for the BMW 4 Series F82/83 M4 Coupe/Convertible, M4 Competition & M4 CS Coupé (OPF/GPF equipped models only). It replaces the section of pipe housing the factory petrol particulate filter with a straight-through pipe, clearing the last major restriction left in a modern turbocharged petrol exhaust once a de-cat and remap are already in place. It's offered in a choice of cat (De-cat with GPF Delete, GPF Delete), so you can pick the setup that suits how the car's used.
It's aimed at owners already running a de-cat and a supporting remap who want to clear the final restriction in the system, not a bolt-on for a car that needs to stay road legal.
Because it removes the particulate filter, it's intended for off-road and competition use. A car with the GPF/OPF removed will fail an MOT emissions test and isn't legal to use on UK roads.
Specifications
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System Type: GPF/OPF Bypass
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Pipe Diameter: 76.2mm (3")
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EC Approved: No
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Race System: Yes
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Fitting Time: approx. 3 to 4.5 hours (Milltek figure)
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
- 76.2mm (3") pipework
- Straight-through pipe in place of the factory petrol particulate filter (off-road and competition use only)
- Designed, developed and manufactured in the UK by Milltek Sport
Fitment
- BMW 3 Series F80 M3, M3 Competition & M3 CS Saloon (OPF/GPF Models Only) (2019-2020)
- BMW 4 Series F82/83 M4 Coupe/Convertible, M4 Competition & M4 CS Coupé (OPF/GPF equipped models only) (2019-2020)
Not suitable for: the BMW 3 Series G80/G81 M3 & M3 Competition S58 3.0 Turbo (OPF/GPF Equipped Cars Only) inc Touring & XDrive Models, which needs the Milltek GPF/OPF Bypass BMW 3 Series G80 & G81 M3 & M3 Comp S58 3.0 Turbo OPF/GPF inc Touring & XDrive 20+.
Installation
Milltek quotes a fitting time of approx. 3 to 4.5 hours. Some versions: Large Bore Downpipes with OPF/GPF Bypass and Decats - Must be fitted with Milltek Sport Catback Only. Some versions: Large Bore Downpipes with OPF/GPF Bypass and High Flow Sports Cats - Must be fitted with Milltek Sport Catback Only. 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 Cat-back Exhaust BMW 3 Series F80 M3, M3 Comp M3 CS Saloon OPF/GPF 19-20.
Will it fit the BMW 4 Series F82/83 M4 Coupe/Convertible, M4 Competition & M4 CS Coupé (OPF/GPF equipped models only)?
Yes. Milltek lists this part for the BMW 4 Series F82/83 M4 Coupe/Convertible, M4 Competition & M4 CS Coupé (OPF/GPF equipped models only) as well as the other models in the fitment list above.
Does it fit the BMW 3 Series G80/G81 M3 & M3 Competition S58 3.0 Turbo (OPF/GPF Equipped Cars Only) inc Touring & XDrive Models?
No. For that car, choose the Milltek GPF/OPF Bypass BMW 3 Series G80 & G81 M3 & M3 Comp S58 3.0 Turbo OPF/GPF inc Touring & XDrive 20+.
Is it road legal?
No. Removing the particulate filter means the car will fail an MOT emissions test, so it is for off-road and competition use only.
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.
Can I use it with my standard exhaust?
No. Milltek states it must be fitted with the matching Milltek system, so budget for the cat-back as well.
How long does it take to fit?
Milltek quotes approx. 3 to 4.5 hours.
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.
