um - not sure that's good value for money. Check through Cooma Diesel (GCG, Garret reps) the cost ....
I was quoted $900+ per turbs way back when.
New = $1250ea for -7's. Now they are $2300 a pair.
You may wish to join Erics GB on the HKS ss' when you find out the price.
He's doing a pair with full kit for $3k
(expect commission if he does Mr Deziner)