BMW M235i Cabriolet (F23) Front Downpipe Sports Cat / De-Cat Performance Exhaust Make_Renault When using silicone

When using silicone

What will the new  ratio do to the top speed

The solenoid coil itself from the factory-fitted valve is great (the ECU opens it faster than any pneumatic valve so why replace it

Example of Corsa D 1

BMW M235i Cabriolet (F23) Front Downpipe Sports Cat / De-Cat Performance Exhaust Make_Renault When using siliconeCobra Sport performance exhausts enhance the sound, looks and quality of your vehicle giving you the ultimate driving experience. Our sports exhausts range is fully guaranteed to give you assurance of our quality. This BMW M235i performance exhaust is made in 3" 76. 2mm pipework and fits from the turbo to the centre exhaust to replace the standard catalyst. The de cat exhaust version issold for motorsport and off road use only worldwide. The sports