Milltek GPF/OPF Bypass for BMW 8 Series M8 & M8 Competition 4.4l V8 Twin Turbo F93 Gran Coupe LCI (OPF/GPF Equipped Cars Only) (2021 onwards) – Filter Delete, Motorsport Use
This is Milltek's GPF/OPF bypass pipe for the BMW 8 Series M8 & M8 Competition 4.4l V8 Twin Turbo F93 Gran Coupe LCI (OPF/GPF Equipped Cars 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 fits to OE downpipes and milltek sport particulate filter back system only (only compatible with models with flanged front connection) requires stage 2 ECU remap or OPF/GPF bypass module (available from www.leib-engineering.de) or fits to OE downpipes and OE particulate filter back system only (only compatible with models flanged front connections) (OE requires cutting)- requires stage 2 ECU remap or OPF/GPF bypass module (available from www.leib-engineering.de) versions, 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
-
System Type: GPF/OPF Bypass
-
Pipe Diameter: 80mm (3.15")
-
EC Approved: No
-
Race System: Yes
-
Fitting Time: approx. 3.5 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
- 80mm (3.15") 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 8 Series M8 & M8 Competition 4.4l V8 Twin Turbo F93 Gran Coupe LCI (OPF/GPF Equipped Cars Only) (2021 onwards)
Not suitable for: the BMW 8 Series M8 & M8 Competition 4.4l V8 Twin Turbo F91 & F92 Coupe & Cabrio (OPF/GPF Equipped Cars Only), which needs the Milltek GPF/OPF Bypass BMW 8 Series M8 & M8 Comp 4.4l V8 Twin Turbo F91 & F92 Coupe & Cabrio OPF/GPF 20+.
Installation
Milltek quotes a fitting time of approx. 3.5 to 4.5 hours. Some versions: Fits to OE Downpipes and Milltek Sport Particulate Filter Back System Only (Only compatible with models with flanged front connection) - Requires Stage 2 ECU Remap or OPF/GPF Bypass Module (Available from www.leib-engineering.de). Some versions: Fits to OE Downpipes and OE Particulate Filter Back System Only (Only compatible with models Flanged front connections) (OE requires cutting)- Requires Stage 2 ECU Remap or OPF/GPF Bypass Module (Available from www.leib-engineering.de). 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.
Does it fit the BMW 8 Series M8 & M8 Competition 4.4l V8 Twin Turbo F91 & F92 Coupe & Cabrio (OPF/GPF Equipped Cars Only)?
No. For that car, choose the Milltek GPF/OPF Bypass BMW 8 Series M8 & M8 Comp 4.4l V8 Twin Turbo F91 & F92 Coupe & Cabrio OPF/GPF 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?
Yes. Milltek notes: "Fits to OE Downpipes and Milltek Sport Particulate Filter Back System Only (Only compatible with models with flanged front connection) - Requires Stage 2 ECU Remap or OPF/GPF Bypass Module (Available from www.leib-engineering.de)". Without suitable software the engine management is likely to log faults.
Can I use it with my standard exhaust?
Yes. Milltek lists it for use with the factory (OE) exhaust system.
How long does it take to fit?
Milltek quotes approx. 3.5 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.
