…is there an advantage to fitting these to an NA? Cheers.
More weight ??? 
might stop that rear end flying away with that tiny wing on it !!! 
Cheers mate…is smaller in real life!
Aaaaannnd bring on the piss take
Yes*
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- You can fit a supercharger at the same time, everything will then work perfectly and you will no longer be gay
Nope, unless you strap a SC or Turbo on at the same time