extracting the best...

OK---finally i've installed the Hot Bits 4-2-1 extractors to make my ride more 'efficient'. There's definitely some difference in terms of performance. I'd just need to very lightly touch the accelerator with my my foot now. The surge is amazing. The ride is smoother and gear changes are hardly felt. What does all this translated into ? --very efficient breathing for the engine and definitely even better fuel consumption and of course , the power .

UPDATE.
RM 10 used to last me about a day, but now it stretches to nearly 2 days.