I can't imagine there is a huge market for upgrading the exhaust on a small city car, nor can I imagine why you would want to do so, but try googling 'Custom Exhaust'. There are any number of companies that should be able to help you out
Usually SEAT I good at doing various sporty exhausts for the car. Doubt they will do one for the Mii as a new bumper design would be needed for a straight out design. Maybe contact one of the after market companies like Miltek and see if they have any plans for one or even use your car as a development car and possibly get one for free!!
As others have said I imagine the market will be small only other possibility is to fit an induction filter from ITG or K&N as these do give a little extra noise and maybe a small performanceimprovementdepending on the amount of cold air you can get to them and if it will fit in the engine bay of your Mii.
It is not so much gettingsponsoredbut seeing if a company is interested in using your car as a test car. Just email them and ask if they are planning or doing anything for the Mii/up!/Citigo. I would guess at the moment no due to the actual numbers on the road, but they well be thinking about it especially when the up! GT and Mii FR come along
According to a Skoda spokesman, they have NO plans for a VRS version of the Citigo. They seem to think it moves the car away from it's target market.
VW appears to have a much wider target for the up! - hence Black and White upon launch, confirmation of GT and E-up! and various other proposed specials to come - including a sort of 'Allroads' version but with only 2WD.
custom exhaust will be nice like the ones you shown. i believe it would look good. at the moment there isnt any aftermarket ones so a custom one should do. i usually go to ashley petformance for the exhausts. they are really good and not that expensive.
i would recommend air filter change rather then cold air ram intake. it wont be as loud but does the job nicely
Borbets are currently being sprayed black lol but once back and fitted il be happy to put pictures up also waiting for my coilovers to come through the post trying to get it into fast car magazine hopefully