You could just try removing the central silencer box (the one that sits under/in the bike, next to the rear shock) first, and leave the cat in place and see if that is loud enough for you? Then you wouldn’t need a re-tune or additional ECU.
If you havent already bought one, I have a LeoVince header pipe for the same model that I’m not using which you can buy off me? Also have a spare DNA air filter going as well. Neither have been used and were bought in the last 2 months
Yep, the big black box. That isn’t the cat by the way, it’s an additional silencer (muffler). The cat is the smaller first silencer which is closer to the engine, located inside the frame on the left hand side of the bike. Like I said, try keeping the cat but removing the big black box with a link pipe. It should be louder.
BradSpeed, I have had no cat and no 2nd muffler, just the large black 1st muffler. I also have a Coober open air box lid and no tune. It’s been 500 miles now with no issues. It will make your bike louder with deeper sound and the occasional pop/crackle when coming off the throttle at higher RPM. Feels good, sounds good, and runs good!