It's not uncommon, but only necessary for race applications.
If you'd like, speak to Brian Jelich at https://www.jelibuiltperformance.com/ and he can give you the lowdown on o-rings and boost capability.
__________________
Bill Cohron - The Mad Doctor  
Power Hungry Performance - The ORIGINAL in Ford performance tuning... Since 1996!
(678) 890-1110
www.gopowerhungry.com - Home of the Hydra Chip, Minotaur Tuning Software, and the new Orion Reflash System for Navistar!
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