SouthFloridaApp, if you race onroad, then you really gotta try the new SUV2 tires. I tried the 32SUV2 last race and they were much better than the SU series. Definitely won't last as long, but are much grippier.
As for can bending on the X-factor, It's never happened to me but I've heard that if you crash really hard, because there isn't very much material in the front area around the collector, due to impact, the thin aluminum parts bend. I'm assuming its probably more of an issue with mod cars but it's worth noting. If it bends, then the motor won't be straight and you'll have to buy a new motor.
I get why they did it though, a more open can design will have better cooling especially if you have a fan blowing in the holes.