about 130-150 depending where u get it from - woodford garage have them in stock.

they are as the gasket should be, not a bit of cornflake box with a bit of tin foil folded round the cylinder holes. they are like the evo gasgets are as std - ive not heard of one go yet. if the engine is in good nick and uve had the head off and had it all done - u might as well spend the extra bit now than have to risk having to have the head off again a few months later when the frosty packet blows again.