what pipe is better stage 6 or hebo?

i got a hebo performer exhaust and i just had some1 offer to swap it for a chrome stage 6 pro replica does any1 know what pipes better for a nrg mc3 dt 2003 i got 4.5grm rollers at moment and hebo still dont move will the stage 6 work with 4.5s also its really slow its deristricted and even with standard pipe(derestricted) it dont move and wont rev very high could jets need changing? thanks 4 ur time