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mountune MRX Cylinder Head w Camshafts - 1.6L EcoBoost

mountune MRX Cylinder Head w Camshafts - 1.6L EcoBoost


Regular price $3,779.10
Regular price $4,199.00 Sale price $3,779.10
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The mountune MRX Cylinder head upgrade for the 1.6L EcoBoost (Fiesta ST) features dyno and flow bench-tested improvements that produce maximum reliable power across a wide RPM range.

Each cylinder head is based on a new genuine Ford ST casting that is inspected before receiving a precision NEWEN valve seat profile.

The throat of each port is opened up to remove obstructions and then blended into the valve seat to improve flow.

Intake airflow is improved by 51% and exhaust airflow is improved by 24% compared to an otherwise stock 1.6L EcoBoost Cylinder head.

Product Code 2364-MHA-AA
Application Fiesta ST 2014-2019

Our 1.6L EcoBoost MRX cylinder head also features high-performance black nitrided intake valves, sodium / Inconel filled exhaust valves, along with our motorsport valve stem seals, and your choice of V2 or V3 camshafts.

Intake Valve Specifications:

Material Black Nitrided Stainless Steel
Length 98.8 mm
Stem Diameter Ø 4.96 mm
Head Diameter Ø 30.10 mm

Exhaust Valve Specifications:

Material Sodium / Inconel Filled Alloy
Length 99.65 mm
Stem Diameter Ø 4.95 mm
Head Diameter Ø 24.90 mm

V2 Camshaft Specifications:

Intake Duration 260º (OE Duration 228º)
Exhaust Duration 244º (OE Duration 212º)
Intake Valve Lift 8.64 mm (OE 7.59 mm)
Exhaust Valve Lift 7.32 mm (OE 6.19 mm)

V3 Camshaft Specifications:

Intake Duration 272º (OE Duration 228º)
Exhaust Duration 254º (OE Duration 212º)
Intake Valve Lift 9.55 mm (OE 7.59 mm)
Exhaust Valve Lift 8.41 mm (OE 6.19 mm)

This head is ideal for those running a larger than stock turbocharger.

The mountune MRX Cylinder Head w Camshafts - 1.6L EcoBoost ships completely assembled with valve lash set using all new cam followers and ready to install on you engine.

Build Times & Shipping Information

CURRENT BUILD TIME: 5-6 Weeks (As of March 2023)

Please note engine assemblies, including heads, are considered custom products and cannot be returned. Additionally, once the engine build and assembly process has begun, the order cannot be canceled.

For more information please contact us.

Installation & Break-In Process

To see all available installation and break-in instructions, click here.

Disclaimers & Legal

This part has been designed and is intended for off-highway application only. Installation of this part on a vehicle that is driven on public roads may violate U.S. and Canadian laws and regulations relating to emission requirements and motor vehicle safety standards.

Click Here for emissions compliance information.

California Residents Prop 65 Information
California’s Proposition 65 entitles California consumers to special warnings for products that contain chemicals known to the state of California to cause cancer and birth defects or other reproductive harm if those products expose consumers to such chemicals above certain threshold levels. This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

For more information visit

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