Since i asked them to quote using the standard cat i'm assuming it would just be the 2" same as standard.
However I'm sorely tempted by the hytech replica made by PLM
https://www.privatelabelmfg.com/product ... header.htm
*edit fixed incorrect link
It has lots of good reviews on other prelude sites. It would need some modification, either notching a cross member or it seems there's the possibility of modifying the header itself to increase ground clearance.
And then sports cat and cat back from Top Gear Stockport. I was verbally quoted £200 for the high flow cat, £350 for catback system (again i think this was for standard oem replacement) but they said to custom make the header would be about £700 and even recommended I buy one that is already made or they could source one for me.
Aarrrgh it's gonna cost me more than the car and I'm still not 100% on the plm one as with anything, there were one or two that hated it.