The new JDM STI im getting has fitted a H&S downpipe (twinscroll) TSL centre and TSL group N backbox

I have the full H&S decat, turbo back, from my old scoob which i was going to fit on the new one

Is it worth the hassle of changing the TSL centre for the H&S centre pipe ?

What sort of money would a mint TSL backbox go for? Also have a H&S downpipe and catpipe and centre (or TSL centre) to shift as well?


Cheers
Trevor