Dizzy28

It just started a few days ago an is getting worse an worse so i had plans on an h pipe because one of my catalytic converters was deff plugged. So i did that to no avail. So i cleaned the maf sensor an installer a k&n intake also while at it still no luck im not throwing any codes its when im at a quarter to half throttle if i punch it it doesnt do nothing just bogs like its choking i checked vacuum lines see no issues. Someone told me fuel pump.. I replaced the fuel filter 3 months ago idk if it may be faulty or what im lost on this i was thinking the fuel pressure regulator or the egr vavle. My cars a manual it does this in every gear an no engine lights or codes. Anyone have this same issue?