Vp ss exhaust upgrade

[VpTom]

Hi, I’m puttin a twin 2.5” exhaust on my fairly stock ss. Just trying to decide on extractors. Genie or is it worth the extra money for pacemaker? Pacemaker have a 1 3/4 option and genie only have 1 5/8. Would I need the extra flow or would I lose power?

Thanks