Actually I just built one to test for a friend. Did just over 7.25 net after displacements.
Removable port with 21sqin per cube tuned at 47 for now but we have more testing to do.
He has 2 xl15s m1s also. Tested on an ap1500 @.35 did 150.8
I know the truck fairly well seeing I've helped him the past 2 years for meca and usaci. If you need anything or some questions just pm me man.
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Learning to get "loud"