Catless.Sorry, I didn't see note if the owner use catless downpipe or stock. Did the owner still use stock downpipe/frontpipe? The dyno sheet showed power curve similar like other dyno sheets from cars with S3 turbocharger that you tune.
I'm thinking about swapping back my stock downpipe and frontpipe. I have 2 little children under 5 years old & they don't like the exhaust fume.