Info needed - Headers & Down pipe

[Zx14rider]

Guys I have a pair of Headers and Down pipes that came from Japan when the car was imported. The previous owner had a duel catback system installed but didn't get either headers or down pipes fitted due to cost. The car is loud enough but wondering if it would make it noisier if I just installed the headers. I would love to know how much these are worth as if I don't fit them I may sell them! See pics. They are like new. Full stainless.

[Leroy Peterson]

It might be louder, who knows. It would sound a lot better though

[Zx14rider]

There is an exaust professional just down the road from me, I might drop in and see what he thinks.