Hyper_dude,

I've just got one for my Hyper although using it with a collari engine. Only recieved it the other day so only ran it for a couple of hours. Seems so much nicer than the one i took off with low and mid range punch seemingly better. I got the hard coated one which looks excellent especially with purple manifold seals. Dont think there's any other difference between the polished or hard coated one, think it is bling factor.
Cost wise, i paid about £38 but imported it as i struggled to find it in UK. Got it in about 5 days from ordering. Shame its covered in crud already....

Hope this helps