performance head for nova gsi

[vauxdan]

hi guys just bought a mint nova gsi intent ti keep it nearly standard apart from under the bonnet so just wondering where i can get a performance head for it how much will it cost me and how many horses will it give me cheers

[womble sri]

www.bldenstein.co.uk he is semi retired but the garage still carries out the work to his spec cfost 500+ but he reckons he can get 35% more power