I have fitted the Hurricane induction kit and the Larini sport exhaust on my MY06 Exige today. You can find the document here if you want to read. The upgrade gave me 20 hp at 7500 rpm. 
Before: http://web.telia.com/~u13142329/exige/Lotus_Exige_RR_Before_upgrade.doc
After: http://web.telia.com/~u13142329/exige/Lotus_Exige_RR_after_upgrade.doc
I have fitted the Hurricane induction kit and the Larini sport exhaust on my MY06 Exige today. You can find the document here if you want to read. The upgrade gave me 20 hp at 7500 rpm. >
Before: > http://web.telia.com/~u13142329/exige/Lotus_Exige_RR_Before_upgrade.doc >After: > http://web.telia.com/~u13142329/exige/Lotus_Exige_RR_after_upgrade.doc >
20hp, just from induction kit and exhaust? Sounds too good to be true. Got the Larini exhaust on my car - certainly sounds good and racey, but hard to say whether it made an improvement in power. Subjectively feels quicker but that is probably cos it is bloody loud on the second cam.
Mark
The two torque curves are too smooth. They dont show any of the characteristic tuning points at 4500 and 7000rpm. Also the second run is making 23% more torque at 3000rpm. The only way to achieve that is with a blower.
I reckon you may have made a reasonable improvement with the mods anyway. And who cares about numbers, I bet it sounds the bollox