I have tried like hell to resist doing anything to the motor on my 2018 SGS 115th Anniversary Edition and it hasn't been easy. I had told myself that I would stop at the SEPST tuner and SE air cleaner. However, today I did some bartering with my brother. He wanted a set of drag wheels that I had for his Mustang, so we agreed that in exchange, I would accept his brand new SE 515 cam and SE lifters which he did not use in his SE Stage IV build. Now I'm contemplating what to do for head work. This might get expensive real quick, so I need to be careful. I'm going to try and collect parts until I'm out of warranty before I jump in on this one.