s3 remap question

[W15hhh]

Looking to get my Audi s3 8p s tronic remapped on a stage 1 shark map, wondering if would see better figures using a NON res milltek cat back system or would it be similiar to standard exhaust

Cheers

 

[DriverN00B]

A catback won't do much for performance at all, get either a full turboback exhaust or 3" downpipe for some more ponies