i have both blow off valves as low as they go , 5 inch down pipe and exaust , no muffler, 23 psi fuel pressure, easily boosts 60 psi, then the guage runs out of numbers waxed a ws6 trans am twice from 50-100mph he was thinkin wtf the first time and then tried again then he wouldnt even drive by me anymore, run the tst on 7x7 i also have an ez to stack but have not tried it yet... the twins are by piers...