somehow i dont think they would have released something like the vr manta with 15s
just further researched it and it turns out there is no such thing as a vr manta first one was a 95 vs so they arent of a manta
i searched and searched and i dont think they were ever released on any hsv production model if you want to search for yourself check out carbuddy.com but even the first hsv listed there the vl ss group a 88 model which i believe to be one of the first production hsv's ever before that it was all hdt and even it had
16s on it!