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Model Item Name Price
537192 3V Head Cooling Mod / Coolant Balance Tube Ford 4.6 & 5.4

3V Head Cooling Mod / Coolant Balance Tube Ford 4.6 & 5.4

MMR Professional Head Cooling Mod (HCM) for 2005-2010 4.6/5.4 3V  This professional kit includes Billet left and right cylinder head...
$139.99

... more info

455498 Cylinder Head Oiling Modification (HOM) 11-17 Coyote 5.0 / 5.2

Cylinder Head Oiling Modification (HOM) 11-17 Coyote 5.0 / 5.2

This part may save your engine!! The MMR cylinder head oiling modification ( oil balance lines ) joins the left and right cylinder head together with...
$119.99

... more info

455811 Cylinder Head Oiling Modification (HOM) 2018-23 Coyote 5.0

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...
$119.99

... more info

437192 MMR 1996 - 2004 Cobra / SVT Professional Head Cooling Mod (HCM)

MMR 1996 - 2004 Cobra / SVT Professional Head Cooling Mod (HCM)

MMR's cooling head mod ( HCM ) for for 96-04 DOHC 4.6/5.4 (ALL Heads) - (rear of heads) is designed to help eliminate hotspots in the #8 cylinder...
$199.99

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455478 MMR 2011-2023 Mustang GT 5.0 / Shelby 5.2 Head Cooling Mod HCM

MMR 2011-2023 Mustang GT 5.0 / Shelby 5.2 Head Cooling Mod HCM

MMR's Head Cooling Mod ( HCM ) for the 2011-2023 5.0 / 5.2 Coyote is designed to help eliminate hotspots in the #8 cylinder by...
$199.99

... more info

466650 Replacement O rings for MMR Head Cooling Mods HCM (all)

Replacement O rings for MMR Head Cooling Mods HCM (all)

Replacement O rings for ALL MMR Head Cooling Mods. Improved Viton Brand Material.  Includes QTY 2 O rings per order. If you have a dual O ring...
$12.99

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