RSTuner remap perhaps too.
Does this have any benefits without an exhaust upgrade and/or induction kit?
Yes it does. My exhaust and induction is standard, and have noticed positive difference, including better mpg lol!
If you buy the rstuner new around the £170 mark then its allready unlocked
There was one for sale for £95 in the for sale section, not sure if its sold though.
Or you could see if anyone near you would be kind enough to lend you their kit, and all you need is the unlock code