Headers & exhaust

[TomZR1]

I have 90 zr1 bought it 5 months ago looking to up grade exhaust ,like to do headers is it woth the money & noticeable hp Gaines & what brand, wher to get em. What about mufflers or cat back system? I think resanator is stock,Car has flow master mufflers they look ugly looks like 4 tubes coming out of the rear, correct me if I'm wrong stock resonator has no cuts going to y pipe it's all one ,mines cut with clamps to muffler with clamps, resonator has no markings so I'm guessing stock sounds good but looks like crap.any info or pics would greatly appreciate it thanks.