I didnt look at my boost on my 11.0 pass and havent ran it turned up since , i figure the twins i have now would put out maybe 65-75 psi depending on how much heat you through at it , but Nathan is right if i go bigger the frozen boost unit probably wont cut it .
I think all of the others parts you get in the kit would make the cost worthwhile. Even if the cooler fails you still have all the other parts IMO...
I think I may try Frozen boosts kit next season on the puller. I make nowhere near the boost you guys with twins do thou, so I figure it should hold up ok.