errr, i thought stock MS6 barely breaks into the 14's ?
i heard of MS6s going 13.4 also but that is pretty heavily modded ones with near professional drivers.
spose if you adjust tune a tad and get a bit better shifts you'd break into 13s?
Stock is like 14.1 and I have seen some in mid to high 13's. I'm not gonna say this is what my car is only capable of since I only ran it down the track once and missed a gear. My launch wasnt the best and I had a 1.9 60'.