i called cpi on thursday and they said they are no longer makeing blaster pipes
Talked to Mike @ CPI yesterday. He's out of stampings for the 240 BB and has no plans to order more. He can, and will build them from scratch. Three to four weeks if you want one. They're going to be much more expensive than stamped version.
I heard dyno ports are good and f7
Dyno port does custom pipe building