if your using the OEM hose, i don't think it will fit and you do need the adapter.
I allready had the samco hoses on and that will fit.
It's a bit of a struggle to get the hose on the TB but it does fit.
At least mine does
Youd best be buying it at CFM becouse it is cheaper for the same TB.
I'm not dooing any engine work on the ST.
Hopefully this saterday i will fit the adjustible camgear and that will be the last power upgrade for the ST.