Don't have a sy yet, I'm looking to get one (just don't want to go to Missouri or Kansas to get it.). I've got an sten, and like to street race (just not all that fast). I pulled up against an old stlye sten, so I was revving my truck, then I realize it was a sy ( wasn't paying much attention at first, just seen an old style sten and thought Hey I can beat that). Anyways, to make a long story short it was REALLY ugly. Man those things are fast, I didn't even hear him build any boost like yall say to do. Can't wait to find one close at a reasonable price.