Realise this is an old posting, but thought I'd stick my tuppence in
Recently had matched inlets fitted, and enlarged throttle body, and sportscat on my Phase 1 172
Was running 165 BHP a year or so ago, and will get up to Engine dynamics for a full stage 1 remap, then can tell you what the new figure is. Not expecting much, busting 170bhp be nice. Its the driveability I am after.
It already feels much smoother, and couldn't believe the speed I was doing at one time the other day
However, no more mods for me on this Clio, other than a colour change, as for a motor that cost me £500 its as far as I wanna take it. Anything faster and it will be a new purchase