This is a machining service we offer for you to send in or drop off your pair of 7.3L Powerstroke cylinder heads to be o-ringed.  We recommend using Cometic MLS or MLX type head gaskets with O-ringed heads.  Factory graphite gaskets will not work as the wire o-ring will cut through the compacted graphite. 

Features:

• Handle higher boost
• Machined in house on our CNC Hurco VMX42i Milling Center