Im sort of stuck here im wondering if i run the thermal 2 1/4" with a 2.5" downpipe and carsound highflow cat and a open dump will i be able to make 350whp or will i be pushing it?

Advice guys

 

i made 326 @ 12 psi on stock internals with a 2.25 crush bent midas exhuast with a jackson high flow cat and 2.5 in down pipe.

im now running 2.5 in cown pipe with 3 in exhaust mandrel bent from the down pipe back with no cat