Valve spings and nitrous.....
I take just a slightly different thinking on this. The spray will have you gaining in rpms really fast, and it's easy to over rev, I know I have mucho times. So, if your running old stock springs, upgrading is not a bad idea. the Z06 yellow springs are considered dead after about 20/25k of hard use, so it's really a personal call. With that said, i ran the stockers with no issues on my LS6 and beat on it as hard as anyone.
Robert
Robert


