A stock VE doesn't need a girdle. Doesn't matter if its a SR20VE, or a 16ve n1. They were designed not to have one.
However, once you start doing significant modifications eg, high compression, big cams, high revs, boost etc then installing one is a good idea.
However, once you start doing significant modifications eg, high compression, big cams, high revs, boost etc then installing one is a good idea.