Well, I believe they're tested at 55 PSI after being machined, but that's obviously completely different than standing up to 55 PSI coming off a turbo. Compressed air out of a tank is going to be colder than room temp, and that turbo would be cherry red.


I've never seen any comparison whatsoever of any of the sleeves available for the B series engines. And other than a couple people jabbering about this sleeve or that sleeve dropping after installation, I haven't heard bad about any of them.