Just go to any motorbike shop if your happy with a bike style one, i use a dirt bike helmet cos they have a large opening and keep my face fairly cool.
I need to beat a 1.25.00 and Andrew needs to beat a 1.17.00, we both have new mods and should be able to improve on our old times
I got the first home owners grant with my place. Its really easy to get you shouldn't have any problems.
Go to this site they have a eligibility checklist for it, Revenue SA
Im pretty sure the -7 are the smaller ones, then -5 and -10 are even bigger. The numbers do not go in order of size for some strange reason.
My -5's come on full boost at 18psi at about 4500-5000rpm
Check out this thread
GT2860r-7 or -5 Responce
With that power i had street tyres and did a 1.25.00 and i try'd not to rev it over 7000rpm
This time i have 300kw, semi slicks, half cage, and i want to fit a oil cooler before i go out. I don't think I'll be running it at full boost though.