Oh yeah I completely agree, if you've got a whole host of mods then a custom remap is definitely worth it. I've just got a cat back system though, so for me the extra just wouldn't be worth it
I've not done it myself, but I've heard that most of the problems come with trying to get the old system off, some people resort to cutting the old system in half. If you've got it up in the air it's a different matter, but on axle stands you might struggle.
It's doable though.
I think personally myself would take it to a decent indy and let them do the hard work. Have no idea how much they would charge. Reckon £90? Would be a good solid days work and pleanty of swearing and cuts to the hands!! Ha
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