Is a Borla Challenge Exhaust system desirable?

[undercover]

I have a set that's new in the box, and I bought it some time ago to put on my Guldstrand GS-80 car (450hp 388ci solid roller L98 derived, single-plane EFI, Traco Headers, etc.).

However, this being a ZR-1 kit, I'd have to hack the front pipes a bit to mate it with my headers.

I have read past posts about the resonator necking down, and it does (I can measure how much but haven't bothered yet).

My two concerns with using this setup are: 1) I'd be destroying a NLA ZR-1 kit that someone may want and 2) I may lose some HP from the high-revving small-block if I use the included center resonator anyway, requiring further modification to the system at which point it's easier just to build one from scratch.

However, if you tell me these systems aren't desirable or worth much, I may throw it on there because it looks great and the quality is nice.