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"X-Head" Assembled Aluminum Cylinder Head Fits 289/302/351W
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FORD PERFORMANCEPART NUMBER: 397-M-6049-X306

"X-Head" Assembled Aluminum Cylinder Head Fits 289/302/351W

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"X-Head" Cylinder Head
    "X-Head" Assembled Aluminum Cylinder Head
  • Fits 289/302/351W
  • Intake Valve: 1.94"
  • Exhaust Valve: 1.54"
  • Intake Ports: 178cc
  • Exhaust Ports: 62cc
  • Combustion Chambers: 64cc
  • 1/Pkg.

    Ford Performance 397-M-6049-X306 Features:

    Ford Racing Cylinder Heads

    Upgrade airflow and unlock real horsepower with Ford Performance 289/302/351W Aluminum Cylinder Heads, available at JEGS. Designed for enthusiasts building or upgrading small block Ford engines, these high-performance cylinder heads deliver improved combustion efficiency, increased power, and modern reliability. Engineered by Ford Performance, the Ford Performance 289/302/351W Aluminum Cylinder Heads are built to meet the demands of street and strip applications while maintaining OEM-level quality and fitment. Whether you’re restoring a classic Mustang or building a high-output Windsor-based engine, these heads provide a proven performance upgrade.

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    Performance Benefits & Key Features

    Ford Performance aluminum cylinder heads are designed to significantly improve airflow, which directly impacts horsepower and torque output. Featuring optimized intake and exhaust port designs, these heads enhance air/fuel mixture delivery and exhaust scavenging for more efficient combustion. The result is stronger acceleration, improved throttle response, and increased overall engine efficiency.

    Constructed from lightweight aluminum, these cylinder heads offer superior heat dissipation compared to traditional iron heads, helping reduce engine temperatures and improve durability under load. Key specifications often include larger valve sizes, precision-machined combustion chambers, and upgraded valve springs designed to support performance camshafts and higher RPM operation. These heads are capable of supporting builds in the 350–500+ horsepower range depending on configuration.

    For performance enthusiasts, these upgrades translate into a noticeable improvement in engine responsiveness and power delivery. Whether naturally aspirated or paired with mild forced induction, these cylinder heads provide the airflow and strength needed for consistent, reliable performance.

    Fitment, Compatibility & Applications

    The Ford Performance 289/302/351W Aluminum Cylinder Heads are designed for compatibility with small block Ford Windsor engines, including 289, 302, and 351W platforms. This makes them an ideal choice for a wide range of Ford vehicles, from classic muscle cars to modern performance builds.

    Perfect for street performance, drag racing, and restoration projects, these cylinder heads are commonly used in Mustangs, Falcons, Broncos, and classic Ford trucks. Their OEM-based design ensures proper fitment with factory-style components, while also allowing seamless integration with aftermarket intake manifolds, camshafts, and valvetrain upgrades.

    These heads are especially popular among enthusiasts performing engine rebuilds or upgrades, as they offer improved performance without requiring extensive modifications. Whether you're building a daily driver with added power or a weekend street/strip machine, they provide the flexibility and compatibility needed to meet your goals.

    Backed by Ford Performance’s reputation for engineering excellence and durability, these aluminum cylinder heads deliver reliable, high-performance results. Explore the available options at JEGS to find the right setup and take your small block Ford engine to the next level.

Part TypeCylinder Head
Product LineFord Performance 289/302/351W Aluminum Cylinder Heads
BrandFORD PERFORMANCE
Package Height8.0
Package Width8.8
Package Length23.1
Weight26.73 PG
Part CategoryPerformance Parts
Cylinder Head MaterialAluminum
Intake Port LocationStandard
EmissionN/A
Exhaust Valves IncludedYes
Locks IncludedYes
Engine Make/SizeFord 302-351W
Retainers IncludedYes
Lock Style7 degree
Guideplates IncludedNo
Rocker Arms IncludedNo
Oiling StyleThrough pushrod
Rocker Arm Nuts IncludedNo
Cylinder Head FinishNatural
Valve Seats MachinedYes
Valve Seat MaterialSteel
Heat CrossoverNo
FinishCast Aluminum
Number Of Springs Per ValveSingle
Valve Springs IncludedYes
UsageStreet/Performance
Valve Seat Machine Style3-angle
Damper Spring IncludedNo
Valve Guides IncludedYes
Cnc-Machined Intake RunnerNo
Intake Valves IncludedYes
QuantitySold individually
Cylinder Head TypeStandard
Valve Stem Seals IncludedYes
Intake Valve Diameter1.94 in (49.276 mm)
Accessory Bolt Holes DrilledYes
Exhaust Runner Volume (Cc)62
Exhaust Port LocationStandard
Valve Guide MaterialBronze
TypeComplete
Outside Diameter Of Outer Spring1.5 in (38.1 mm)
Combustion Chamber Volume (Cc)64
Machined For O-RingNo
PreparationBolt On (Not Required)
Steam Holes DrilledNo
Rocker Arm Studs IncludedNo
Cylinder Head StyleAssembled
Valve Stem Seal StyleUmbrella
Retainer MaterialSteel
Intake Runner Volume (Cc)178
Cnc-Machined Exhaust RunnerNo
Cnc-Machined Combustion ChamberNo
Exhaust Valve Diameter1.54 in (39.116 mm)
Vendor Part NumberM-6049-X306
Package Qty1
Package TypeEA
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