Just to re cap - the air pipe from the front is called a CAI (cold air induction).
On my mazda its supposed to give you around 5-12bhp depending on who you talk to where you read it. (standard mazda 1.6 has 115bhp)
I did feel a difference on my 1.6 mx-5, but not worth spending too much on.
The air in front of the bumper is the only real high pressure area when driving. The air above the bonnet is fast moving ([

)]) low density air.
High density means a better charge.
I was planning something when I get my panda but only to the inside of the grill or somewhere once ive had a look. I also want it to be reversable.
I dont want it to be really fast or anything - character is where its at, but I wanted to get it "breathing" easier as it should make it rev smoother. [?]
However, I think all this talk of top speeds is a bit weird.
You have nothing to prove driving a panda - its when you drive a clone-mobile that people tend to feel insecure....
When my mx-5 was standard I never felt the urge to prove anything. I knew it handled better than prety much anthing else and was a joy to drive. I also knew it was slower than a 2.0 mondeo. Now ive over 200bhp in a car thats under 1000kg. I cant stop feeling that ive to put all these TT owners in their place (which it can do without getting close to a rev limiter in any gear).
This is probably why im looking for a panda - I want to get back some of the "i dont care because im having fun" factor.
As for the speedo figs, we have loads of debate on the mx-5 forum. Most speedo's aree well out at top speed. The wheels and tyres really change things - especially if the tread is a little down. I have a G-Tech pro which will tell me the truth, although I use it mostly for comparison tuning. (cost £26...+shipping)