It depends which body kit you chose. Equinox were the ones offering the highest under-bonnet clearance to my knowledge (main reason why I chose to buy my body kit from them)
BonnetParalSide by
Sylvain ROIG, sur Flickr
If you use GRP side panels, you can also add 3-4mm of side panels tab thickness over the top tubes of your chassis.
You can also check with Vmax how high is the bonnet of his new body kit?
Hope that help