I have a set of stock HG's (Victor-Reinz) that I bought to do a rebuild and since then I went in a totally new direction $$$$. I always had luck with the stockers and I would like to use them but I just wanted to make sure I could now that I have the GN1's. I don't want to use the "bullet proof" HG's because it's all in the tune, right? A HG to me is just a 'fuse' for the motor so you don't do further detrimental damage, which you still could.