My roommate has a 99 civic si that has a greddy kit. he had built his motor and had some head work done. his block is bored 80 thousands bigger. i know he has forged pistons and is boosting 20 pounds other than that I not to sure about what he put in his car. so the other night he went out and came back to the house to find what he thought was a blown rad. hose. was really coolant in the number 4 cyl. I told him he probility blew his head gasket. what he told me that when he put his motor together he used a stock head gasket. and had reused his head bolts. I told him he need arp head studs and a head gasket made for turbo. so I asking everyone what kind of headgasket does anyone recommend and where would be a good place to get it.