Just asking for some advise and opinion?
Is it worth changing the exhaust of a TL VRX (manual) to a 2.5inch redback system?
Will there be any power gains?
I know there will be a gain in noise as I already have a red back exhaust on my TF V6 have seen some power and noise gains but thats an upgrade from 2.25inch pipe to 2.5inch pipe, where-else the TL has already got a 2.5inch pipe and a sports exhaust. In short the redback system would be of similar set up but with slight differences.

You probably won't notice much given you already have a high flow muffler. I vote don't bother, unless your going to do extractors and high flow cat as well

so you are suggesting i should do an extractor and high flow cat and do an exhaust to be worthwile... ok i'l take note of that.

It's just one of those things that if your doing extractors etc, you might as well think about doing it then :)

But its probably not worth while just doing it on its own.