Mack Doctor Jr. Posted December 1, 2009 Share Posted December 1, 2009 I was just wondering if any body would know how much boost the heads would take, before the head gasket blows out. Im putting on a big holset turbo and was just wondering how long it will last.lol Im hoping to get at least 80psi. Its and HC5A off a KT600 cummins. What so u think will it work? Later~Joe Quote Link to comment https://www.bigmacktrucks.com/topic/11606-e9-boost/ Share on other sites More sharing options...
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