I hope this is in the right section, but I want to adjust my boost to avg at 18 is this going to be safe with all stock internals on my 02 WRX 100k miles. Right now it's average is at 12 and peaks at 15. I'll be purchasing a wideband because I know this increases the chance of the fuel running lean. Any input is better than no input. Also if it's not safe to avg at 18 what would be a good avg boost for more power? Thanks.