Welcome to Just Commodores, a site specifically designed for all people who share the same passion as yourself.
If you want to get a good upgrade for a VY SS, get the ones off a HSV VY II.
They are 1 3/4" pipes. Grind the weld from the middle, regrind on the outisde, and then you have a set of pipes that are only a handfull of KW's lower than the Pacemakers at 1/4 price.
Ummm....no. Not the same, not nearly the same. The primary pipes are way shorter than most other extractors.
I think he has a V6. The VS are different. VT-VY are all the same as far as fitment goes.