Cobra BMW F40 128ti GPF Back Race Rear Box Delete Performance Exhaust
Transform the sound and character of your BMW 128ti with the Cobra Sport GPF-back race rear box delete performance exhaust. Designed specifically for the BMW 1 Series F40 128ti 2020 on, this 3 inch 76.2 mm GPF-back system replaces the centre and rear sections to deliver an aggressive, motorsport-inspired tone with proven sound gains, while retaining the factory GPF section. If you are searching for BMW 128ti exhaust, BMW 128ti performance exhaust, BMW F40 128ti exhaust, BMW 1 Series F40 exhaust, rear box delete, back box delete, race exhaust or GPF-back exhaust, this Cobra system is the upgrade enthusiasts choose.
Why choose this BMW 128ti performance exhaust
- Vehicle specific fitment for BMW 1 Series F40 128ti 2020 on
- GPF-back configuration retains the factory GPF section
- 3 inch 76.2 mm pipework for improved flow and a sharper, louder soundtrack
- Race rear box delete for maximum presence and response
- Tested sound gains: 70 dB at idle plus 12.7 dB and 91 dB at 4,000 rpm plus 8.5 dB
- All relevant fittings and gaskets supplied for a straightforward install
- Backed by the Cobra Lifetime Warranty non transferable for peace of mind
Valved and non valved options
Valved exhaust options retain the factory valve control so the tone changes with drive modes. Non valved options remove the valves so the exhaust note remains consistent. Using a non valved exhaust will not harm the running of the vehicle. Cobra Sport has engineered both options to deliver the best sound quality and driveability for the BMW 128ti.
Tailpipe options 4 inch tips
- TP34 4 inch Chrome Inward Rolled tailpipe
- TP38 4 inch Chrome Inverted tailpipe
- TP17 4 inch Jap Style tailpipe
- TP38-BLK 4 inch Black Ceramic Coated Inverted tailpipe
- TP107-CF 4 inch Slash Cut Carbon Fibre tailpipe
- TP108-CF 4 inch Slash Cut Carbon Fibre tailpipe
Sound figures GPF-back rear box delete
- Engine at idle: 70 dB plus 12.7 dB
- Static 4,000 rpm: 91 dB plus 8.5 dB
Compatibility
BMW 1 Series F40 128ti 2020 on
Part numbers
- BM146TP34 Valve TP34
- BM144TP34 Non Valve TP34
- BM146TP38 Valve TP38
- BM144TP38 Non Valve TP38
- BM146TP17 Valve TP86-17
- BM144TP17 Non Valve TP86-17
- BM146TP38-BLK Valve TP38-BLK
- BM144TP38-BLK Non Valve TP38-BLK
- BM146TP107-CF Valve TP107-CF
- BM144TP107-CF Non Valve TP107-CF
- BM146TP108-CF Valve TP108-CF
- BM144TP108-CF Non Valve TP108-CF
Manufactured by
Cobra Sport
Warranty
Cobra Lifetime Warranty non transferable
Fitting and installation
This is a direct GPF-back replacement for the centre and rear sections. All relevant fittings and gaskets are supplied. We recommend professional installation. Book fitting with Nforcd in Warwickshire. Request a quote at Sales@nforcd.com.
What our customers say
We have fitted and used this Cobra Sport BMW 128ti exhaust and the feedback has been consistently positive. Customers love the sharper throttle response, the addictive race tone and the high quality finish. It is the go to BMW 128ti exhaust upgrade for drivers who want a proper back box delete sound with everyday usability.
Photos and video
Search terms this product targets
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