Those are fairly large cams, and will require dished or flycut pistons. They also feature a rough idle and are not great candidates for a daily driver imo. You will have to replace the stock springs, and Comp's beehive springs and some upgraded retainers are what I would recommend. To get the full effect of these cams, you should consider LT's and a new Xpipe at the same time. Call Comp and talk with one of their techs about what they recommend in terms of gearing, fuel system and tune for these.Alright i have an 02 GT all factory and i'm wanting to put cams in it. I have found the comp cams xe274's. What other upgrades would i HAVE to do to accomidate the new cams? Thanks -Ben
I'd have to look up the CRA-379611's profile to tell if they need new springs or other mods.ahh i see. I did some more research and i have found the CRA-379611...everything i have found on them doesnt tell me i need different pistons, springs etc. As far as other upgrades i have ordered the diablo preditor, LT's, and an off road H-pipe. I found it came with 40 series Flowmasters. And i do plan on supercharging it also. What do you think?