Track day, 13.6.. y pipe blew off.

i was running and my y pipe poped off a few times but i heard the wistle of a boost leak every race... and its not the turbo spooling noize... and i have a feeling its slowing me down, im not sure, but i wasnt launching super hard, just reving to like 3.5k and slippin the clutch out to launch, had some good launches but idk whats the best way to launch yet with out tearing up my t case, all tho it is pretty much brand new due to recall.. not sure if the boost leak is my bov or if its a pipe somewhere, or my clutch booster? ive heard somethings about those leaking boost? im hopeing when i gut my precats ill be able to maybe hit high 12s when i find the perfect launch.

what else basic stuff can i do to get to the 12s other than bigger turbos and launching harder? any imput