I've been considering doing some mods lately to be honest. I wasn't gonna post, as I'd just get the usual chav/pikey/ripspeed comments etc, but what the hey :-)
I was thinking about adding a K-Tec exhaust and sports cat, along with an ITG Maxogen induction kit and then topping it off with a remap from RS Tuning - generic map then tweaked 'live' on the rollers so it's specific to my car/mods. One guy on the forum has before and after printouts, and the peak gains aren't that impressive, 8bhp & 10lbs/ft or something - but low down the change was much more impressive, a gain of 40lbs/ft at one point! A higher, smoother torque curve all the way through, and peaking a little higher as a bonus. He said it transformed the way the car drove.
The K-tec and ITG were developed by K-tec on their rollers on their stock
197, and as such have proven before and after advtanges, add to that the remap, and the sports cat and the estimated gains for each one togehter totals over 20bhp peak. I'd be happy with 15 to be honest, so the exhaust/induction/cat would only have to muster about 6/7bhp all added together - which shouldn't be too hard for them :-) Hopefully the combination of them won't be too noisy... I'd be able to have a look/listen at their demo 197 myself anyway, which has all these bits fitted and is supposed to be good for 220bhp or so.
Also another thing is that, a lot of 197s rollers with a good few miles on them are showing higher than the quoted power output - showing over 200bhp - so I'd quite like to get it rollered anyway just to see what it's making, as it does feel stronger than the low miles Cup I test drove, or the low miles normal 197 I test drove a few months ago.
So there, that's something I was mulling about :-)