Cylinder Head Oiling Modification (HOM) 2018-23 Coyote 5.0

This part may save your engine!!

The MMR cylinder head oiling modification ( oil balance lines ) joins the left and right cylinder head together with the MMR Balance tube and fittings and balances bank to bank pressure and flow. In the event that the VERY small factory pressure orifice is clogged the head will continue to receive oil due to the MMR balance tube. MMR has seen hundreds of cylinder heads ruined because of oil starvation, this simple, easy to install mod will guarantee that your cylinder heads always remain lubricated along with perfectly balanced pressure.

MMR's 2018-2023 Kit replaces the factory "TAP in"  Freeze plugs with high quality, precision fit stainless steel Fittings. 


MMR also suggests the head cooling mod (HCM) for all performance applications 

NOTE: While we have seen some copies of the MMR product it should be noted that those kits using 2 hoses to join all of the lifter bores together are 100% unnecessary, they add cost, installation complexity, increased points for failure and leaking, increased weight and redundancy, this is because the lifter bores are already joined at the front of the cylinder head via a machined tunnel in the casting making a second hose completely useless.


Stainless Steel MMR Cylinder head Fittings

Black Teflon Motorsports Hose (high pressure and temperature)

Loctite Sealing/Retaining compound


2018-23 Mustang GT

2018-23 F150 w/5.0L

This kit requires installation while the engine or transmission is removed from the car due to the limited space for removing the factory freeze plugs and tapping in the new MMR stainless steel fittings. It is MMR's recomendation that the kit be installed while the engine is removed, BUT we have had customers state that they have installed them with clutch jobs. There are NO returns for this product for any reason so please do not purchase if you are not prepared to install using these guidelines.

  • Model: 455811
  • Manufactured by: MMR


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