My 1 mth old 50th Anniv coupe is wanting LT headers (thinking FLP's???), intake (thinking Vararam, but I may just get a modified air-box & cold air screens???) and a 180 tstat (concerned that 160 may be too low???)... anyone know if these mods will void my GM warranty? Also, if anyone has had a bad experience with these mods, I'd like to hear about it. Thanks!