The new high tech 4 strokes run extremely high exhaust gas temps. The pipe on my yfz gets glowing red hot on a regular basis. This is the norm for most all the high tech 450's. This is extremely hard on the exhaust pipes.

The egt's won't be that extreme on this two stroke. I personally don't think cracking is going to be an issue. That is yet to be proven. I'd bet a dollar that this pipe lasts longer without cracking than my Q v1 pipe did.