I think the Blitz K1 is just a hybrid ct9 if i remember correctly..
someone else can confirm this though
Its a slight hybrid of a ct9 with better response. Powerwise compared to a tdo4 it's not near the figures that a tdo4 can reach. Should see around 200bhp out of one. In terms of spool rate mine spooled fully 18psi by 2600 rpm. Good little turbo. Running mine at 212bhp with 198lbft at 18psi. Hope this helps
Similar to other ct9 hybrid in terms of bhp. However the spool up will not be as quick as it would with the k1.
A tdo4 is a good setup for fast road use too tho imo.
A blitz k1 kit price, now that I couldt tell you as I'm sure they stopped making them years ago. Not certain when tho.
At the end of the day pal you really need to think what your after whether it be response, big power figures or what?
Oh right mate well whatever you do best of luck with it and if you end up with the k1 pm me if you need any help or info