[BoostSlideWayz]

Im personally on a ka24e i built. Arais pistons, eagle rods, lots of machine work including having my cyls bored just slightly beyond stock. Making it somewhere in the 2.4/.5 basically 2.5 and i've been running the stock head gasket for years. I peak around 16 psi before fuel cut. Never had to change it since i built the engine and never had any steam issues besides the usual warm up in cold weather type steam.

Car has been reliable and running strong.

Stock head gaskets usually are very durable. But then again with 400+ hp youll probably want an upgraded multi layer steel head gasket.

Also, are you planning on running E85 with that compression ratio ? If you plan on unleaded fuel ( pump gas ) your going to blow through just about any upgraded head gasket you buy.