Hi Duke
I've been reading your posts ref head studs with interest
I race a Alfa Romeo around 450 bhp SC
I've been using APR head studs for a 968 Porsche 12x1.5 166mm long
We have had some head lift
Im interested in what you have found to improve your set up
I see you have gone to a larger dia stud 9/16 is this an off the shelf stud or some thing else ?
Would you mind emailing me so we can chat please
sales@alfacare.co.uk
it would be a great help
Kind Regards Adrian