i have not touched mine sinice i put them in 4months ago... the benefits you get from them out way the negatives by far!

just put em on then, then put car on Dyno get the desired tune you want then drive off. now wurries

any carbs you put are gonna need fiddling with over time. the guys you see fiddling at the drags are proably, changeing tubes or chokes, maybe fiddling with thier idles/mixtures. but thats only because the want the optimal tune or power they can get for that 400m.

for street no wurries. Go webers mate, you wont regret it