No it wont , it can be difficult getting a car fitted HFC through the mot emissions test , they need to be very hot and even then many are borderline
The Cobra website says
Cobra 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.
These Nissan 370Z performance exhausts are made in 2.5"/63.5mm bore pipework and fits from the manifolds to the y-section.
These sports cats exhausts will enable you to pass a UK MOT emissions test or police road side checks.
All relevant fittings and gaskets are supplied.