long studding and the multi layer head gasket were used on WRC engines......because of the high compression and needing to keep the head on at 3bar plus boost spike!...This was used in conjuction with nikasil liners..to put the strength back to the bore walls.


Touring cars did not run long stud.

500bhp + cars do NOT need long studding....650plus you need to start thinking due to boost figures and flow.

HTH