??? and if so who makes it? and How much?

 

Cometic if you want to do so.... I've had problems with them sealing before but with a little copper spray you should be okay.... They'll normally run ~$90... Good Luck... Also this is just the way i do things and only if money allows but I always just use OE headgaskets... Like I just said in another post I only use Cometic for boosted and big bore motors... Even with an 84.25-84.50mm you can still get away with a stock OE headgasket.... To get the compression up toss in some new pistons.... Again that's just me... Latez